Mail nouveau message

Suite à un problème sur mon site (promotion-linares.fr), j'ai du remonter une sauvegarde.
Depuis, mes utilisateurs ne sont plus avertis par mail d'un nouveau message sur les sujets auxquels ils sont abonnés.
J'ai pourtant paramétré de la même façon que sur le site précédent avec cette fonctionnalité opérante.
Ci-après, ma configuration :

Database collation check:
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20230706j4_kunena_aliases have wrong collation of type utf8mb3_general_ci on field type  
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20230706j4_kunena_logs have wrong collation of type utf8mb3_general_ci on field operation  20230706j4_kunena_messages have wrong collation of type utf8mb3_general_ci on field name  20230706j4_kunena_messages have wrong collation of type utf8mb3_general_ci on field email  20230706j4_kunena_messages have wrong collation of type utf8mb3_general_ci on field subject  20230706j4_kunena_messages have wrong collation of type utf8mb3_general_ci on field ip  20230706j4_kunena_messages have wrong collation of type utf8mb3_general_ci on field modified_reason  20230706j4_kunena_messages_text have wrong collation of type utf8mb3_general_ci on field message  20230706j4_kunena_polls have wrong collation of type utf8mb3_general_ci on field title  20230706j4_kunena_polls_options have wrong collation of type utf8mb3_general_ci on field text  20230706j4_kunena_sessions have wrong collation of type utf8mb3_general_ci on field allowed  20230706j4_kunena_sessions have wrong collation of type utf8mb3_general_ci on field readtopics  20230706j4_kunena_smileys have wrong collation of type utf8mb3_general_ci on field code  
20230706j4_kunena_smileys have wrong collation of type utf8mb3_general_ci on field location  20230706j4_kunena_smileys have wrong collation of type utf8mb3_general_ci on field greylocation  20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field subject  
20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field first_post_message  20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field first_post_guest_name  20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field last_post_message  20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field last_post_guest_name  20230706j4_kunena_topics have wrong collation of type utf8mb3_general_ci on field params  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field status_text  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field view  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field signature  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field avatar  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field personalText  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field location  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field friendfeed  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field bebo  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field digg  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field icq  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field telegram  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field vk  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field microsoft  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field skype  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field twitter  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field facebook  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field google  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field myspace  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field linkedin  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field linkedin_company  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field delicious  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field instagram  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field blogspot  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field flickr  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field apple  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field qzone  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field weibo  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field wechat  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field yim  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field whatsapp  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field youtube  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field ok  
20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field websitename  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field websiteurl  20230706j4_kunena_users have wrong collation of type utf8mb3_general_ci on field ip  20230706j4_kunena_users_banned have wrong collation of type utf8mb3_general_ci on field ip  20230706j4_kunena_users_banned have wrong collation of type utf8mb3_general_ci on field reason_private  20230706j4_kunena_users_banned have wrong collation of type utf8mb3_general_ci on field reason_public  20230706j4_kunena_users_banned have wrong collation of type utf8mb3_general_ci on field comments  20230706j4_kunena_users_banned have wrong collation of type utf8mb3_general_ci on field params  20230706j4_kunena_version have wrong collation of type utf8mb3_general_ci on field version  20230706j4_kunena_version have wrong collation of type utf8mb3_general_ci on field build  20230706j4_kunena_version have wrong collation of type utf8mb3_general_ci on field versionname  20230706j4_kunena_version have wrong collation of type utf8mb3_general_ci on field state  
        

Joomla! SEF: Enabled | Joomla! SEF rewrite: Enabled | FTP layer: Disabled |
        

Ce message contient des informations confidentielles

htaccess: Exists | PHP environment: Max execution time: 50000 seconds | Max execution memory: -1 | Max file upload:  

Kunena menu details:

Attention : Spoiler !

ID	Name	Menutype	Link	Path	In trash
1053	Forum	maximenuck	Itemid=1043	kunena-2023-03-10	No
1043	Forum	kunenamenu	view=home&defaultmenu=1045	forum	No
1044	Forum principal	kunenamenu	view=category&layout=list&catid=0	forum/index	No
1045	Sujets récents	kunenamenu	view=topics&mode=replies	forum/recent	No
1046	Non lus	kunenamenu	view=topics&layout=unread	forum/unread	No
1047	Nouveau sujet	kunenamenu	view=topic&layout=create	forum/newtopic	No
1048	Sans réponse	kunenamenu	view=topics&mode=noreplies	forum/noreplies	No
1049	Mes sujets	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest	No
1050	Profile	kunenamenu	view=user	forum/profile	No
1051	Help	kunenamenu	view=misc	forum/help	No
1052	Recherche	kunenamenu	view=search	forum/search	No

Joomla default template details : cassiopeia_linares | author: Didier LANQUETOT | version: 1.0 | creationdate: Avril 2023

Kunena default template details : Aurelia | author: Kunena Team | version: 6.1.2 | creationdate: 2023-07-08

Kunena template params:

Attention : Spoiler !

DefaultCategoryicon
profileIconset	default
DefaultIconset	default
editorIconset	default
bootstrap	1
borderless	1
tooltips	1
SubjectLengthMessage	80
fullactions	1
quick	0
displayMenu	1
displayDropdownMenu	1
displayDropdownContent	1
displayModule	1
displayBreadcrumb	1
displayAnnouncement	1
displayFooter	1
avatarPosition	left
formRecover	0
labels	0
whoisonlineName	default
avatarType	rounded
topicicontype	svg
fontawesome	1
socialshare	0
socialsharetag
socialtheme	classic
optional_username	0
writeaccess	0
localstorage	0
IconColor	inherit
IconColorNew	#48a348
editorType	ckeditor
Bold	1
Italic	1
Underline	1
Strike	1
Subscript	1
Superscript	1
RemoveFormat	1
BulletedList	1
NumberedList	1
Blockquote	1
JustifyLeft	1
JustifyCenter	1
JustifyRight	1
JustifyBlock	1
Link_Unlink	1
Image	1
Smiley	1
Confidential	1
Hidetext	1
Spoiler	1
Code	1
Ebay	1
Twitter	1
Instagram	1
Soundcloud	1
FontSize	1
TextColor	1
Maximize	1
Map	1
Video	1
editorButtons
nameskinckeditor
ckeditorcustomprefixconfigfile
avatarSizeX	40
avatarSizeY	90
avatarSizeXThumb	36
avatarSizeYThumb	36
avatarSizeXWelcome	72
avatarSizeYWelcome	72
avatarSizeXList	36
avatarSizeYList	36
avatarSizeXPost	144
avatarSizeYPost	144
avatarSizeXProfile	200
avatarSizeYProfile	200
templatebyText
templatebyName
templatebyLink

Kunena version detailed: Kunena 6.1.2 | 2023-07-08 [ Git Repository ]
        | Kunena detailed configuration:

Attention : Spoiler !

Kunena config settings:
boardOffline	0
enableRss	1
threadsPerPage	20
messagesPerPage	6
messagesPerPageSearch	15
showHistory	1
historyLimit	6
showNew	1
disableEmoticons	0
template	aurelia
showAnnouncement	0
avatarOnCategory	0
showChildCatIcon	1
rteWidth	450
rteHeight	300
enableForumJump	0
reportMsg	1
username	0
askEmail	1
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showUserStats	1
showKarma	1
userEdit	3
userEditTime	0
userEditTimeGrace	600
editMarkup	1
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subscriptionsChecked	1
allowFavorites	1
maxSig	300
regOnly	1
pubWrite	1
floodProtection	0
mailModerators	-1
mailAdministrators	-1
captcha	-1
mailFull	1
allowAvatarUpload	1
allowAvatarGallery	1
avatarQuality	75
avatarSize	2048
imageHeight	800
imageWidth	800
imageSize	1000
fileTypes	docx,doc,xls,xlsx,txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
fileSize	5000
showRanking	1
rankImages	1
userlistRows	30
userlistOnline	1
userlistAvatar	1
userlistPosts	1
userlistKarma	0
userlistEmail	0
userlistJoinDate	1
userlistLastVisitDate	1
userlistUserHits	1
latestCategory	0
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showWhoIsOnline	0
showGenStats	0
showPopUserStats	0
popUserCount	5
showPopSubjectStats	1
popSubjectCount	5
showSpoilerTag	1
showVideoTag	1
showEbayTag	1
trimLongUrls	1
trimLongUrlsFront	200
trimLongUrlsBack	20
autoEmbedYoutube	0
autoEmbedEbay	0
ebayLanguageCode	en-us
sessionTimeOut	1800
highlightCode	0
rssType	topic
rssTimeLimit	1 month
rssLimit	100
rssIncludedCategories
rssExcludedCategories
rssSpecification	rss2.0
rssAllowHtml	0
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rssWordCount	0
rssOldTitles	1
rssCache	900
defaultPage	recent
defaultSort	asc
sef	1
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showFileForGuest	1
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maxPersonalText	50
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postDateFormatHover	datetime
hideIp	1
imageTypes	jpg,jpeg,gif,png
checkMimeTypes	1
imageMimeTypes	image/jpeg,image/jpg,image/gif,image/png
imageQuality	50
thumbHeight	32
thumbWidth	32
hideUserProfileInfo	put_empty
boxGhostMessage	0
userDeleteMessage	4
latestCategoryIn	1
topicIcons	1
debug	0
catsAutoSubscribed	0
showBannedReason	0
showThankYou	0
showPopThankYouStats	1
popThanksCount	5
modSeeDeleted	1
bbcodeImgSecure	image
listCatShowModerators	0
lightbox	0
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showSessionType	2
showSessionStartTime	1800
userlistAllowed	0
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enableThreadedLayouts	0
categorySubscriptions	post
topicSubscriptions	every
pubProfile	0
thankYouMax	10
emailRecipientCount	5
emailRecipientPrivacy	to
captchaPostLimit	0
imageUpload	everybody
fileUpload	registered
topicLayout	flat
timeToCreatePage	1
showImgFilesManageProfile	1
holdNewUsersPosts	0
holdGuestPosts	0
attachmentLimit	8
pickupCategory	0
articleDisplay	intro
sendEmails	1
fallbackEnglish	1
cache	1
cacheTime	60
ipTracking	0
rssFeedBurnerUrl
autoLink	0
accessComponent	0
statsLinkAllowed	1
superAdminUserlist	0
attachmentProtection	0
categoryIcons	1
avatarCrop	0
userReport	1
searchTime	365
teaser	0
ebayLanguage	71
ebayCertId
allowChangeSubject	0
maxLinks	6
readOnly	0
ratingEnabled	0
urlSubjectTopic	0
logModeration	0
attachStart	0
attachEnd	14
attachmentUtf8	0
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emailHeader	media/kunena/email/hero-wide.png
userStatus	0
signature	0
personal	1
social	0
plainEmail	1
moderatorPermDelete	0
avatarTypes	gif,jpeg,jpg,png
smartLinking	0
defaultAvatar	nophoto.png
defaultAvatarSmall	s_nophoto.png
quickReply	0
avatarEdit	1
activeMenuItem
mainMenuId
homeId
indexId
moderatorsId
topicListId
miscId
profileId
searchId
custom_id
avatarType	0
sefRedirect	1
allowEditPoll	0
useSystemEmails	0
autoEmbedInstagram	0
disableRe	0
email_sender_name
display_filename_attachment	0
new_users_prevent_post_url_images	0
minimal_user_posts_add_url_image	10
utmSource	0
emailHeaderSizeY	560
emailHeaderSizeX	560
moderator_id
profiler	0
pickup_category
privateMessage	1
board_title	Promotion Linares
board_offline	0
offline_message	Le forum est actuellement hors ligne pour maintenance. Merci de vous reconnecter plus tard.
enablerss	0
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
disemoticons	0
showannouncement	0
avataroncat	0
catimagepath	category_images
showchildcaticon	0
rtewidth	450
rteheight	300
enableforumjump	0
reportmsg	1
askemail	1
showemail	1
showuserstats	1
showkarma	0
useredit	3
useredittime	0
useredittimegrace	600
editmarkup	0
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	0
maxsubject	50
maxsig	300
regonly	1
pubwrite	1
floodprotection	0
mailmod	-1
mailadmin	-1
mailfull	0
allowavatarupload	1
allowavatargallery	1
avatarquality	75
avatarsize	2000
imageheight	800
imagewidth	800
imagesize	1000
filetypes	txt,rtf,pdf,zip,doc,docx,xls,xlsx
filesize	1000
showranking	1
rankimages	1
userlist_rows	30
userlist_online	0
userlist_avatar	0
userlist_posts	1
userlist_karma	0
userlist_email	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory	0
showstats	0
showwhoisonline	0
showgenstats	0
showpopuserstats	0
popusercount	5
showpopsubjectstats	0
popsubjectcount	5
showspoilertag	1
showvideotag	1
showebaytag	0
trimlongurls	1
trimlongurlsfront	200
trimlongurlsback	20
autoembedyoutube	0
autoembedebay	0
ebaylanguagecode	en-us
sessiontimeout	1800
highlightcode	0
rss_type	topic
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	0
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	900
defaultpage	recent
default_sort	asc
showimgforguest	1
showfileforguest	1
pollnboptions	0
pollallowvoteone	1
pollenabled	0
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	0
allow_user_edit_poll	0
maxpersotext	50
ordering_system	replyid
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
boxghostmessage	0
userdeletetmessage	4
latestcategory_in	1
topicicons	1
catsautosubscribed	0
showbannedreason	0
showthankyou	0
showpopthankyoustats	0
popthankscount	5
mod_see_deleted	1
bbcode_img_secure	image
listcat_show_moderators	0
show_list_time	720
show_session_type	2
show_session_starttime	1800
userlist_allowed	0
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	0
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
email_visible_address
captcha_post_limit	0
image_upload	everybody
file_upload	everybody
topic_layout	flat
time_to_create_page	1
show_imgfiles_manage_profile	0
hold_newusers_posts	0
hold_guest_posts	0
attachment_limit	8
article_display	intro
send_emails	1
fallback_english	0
cache_time	60
ebay_affiliate_id	5337089937
iptracking	0
rss_feedburner_url
autolink	0
access_component	0
statslink_allowed	1
superadmin_userlist	0
legacy_urls	1
attachment_protection	1
categoryicons	1
avatarresizemethod	1
avatarcrop	0
user_report	1
searchtime	365
ebay_language	71
ebay_api_key
ebay_cert_id
twitter_consumer_key
twitter_consumer_secret
allow_change_subject	0
max_links	6
read_only	0
ratingenabled	0
url_subject_topic	0
log_moderation	0
attach_start	0
attach_end	14
google_map_api_key
attachment_utf8	0
autoembedsoundcloud	0
emailheader	media/kunena/email/hero-wide.png
user_status	0
plain_email	1
moderator_permdelete	0
avatartypes	gif,jpeg,jpg,png
smartlinking	0
defaultavatar	nophoto.png
defaultavatarsmall	s_nophoto.png
stopforumspam_key
quickreply	0
avataredit	0
activemenuitem
mainmenu_id
home_id
index_id
moderators_id
topiclist_id
misc_id
profile_id
search_id
avatar_type	0
sef_redirect	1
allow_edit_poll	0
use_system_emails	0
autoembedinstagram	0
disable_re	0

| Kunena integration settings:

Attention : Spoiler !

Kunena - Finder Enabled 
 Kunena - AltaUserPoints Disabled
 Kunena - Community Builder Disabled
 Kunena - Easyblog Disabled
 Kunena - Easyprofile Disabled
 Kunena - Easysocial Disabled
 Kunena - Gravatar Disabled
 Kunena - JomSocial Disabled
 Kunena - Joomla Enabled:  access=1  login=1  
 Kunena - Kunena Enabled:  avatar=1  profile=1  

| Joomla! detailed language files installed:

Attention : Spoiler !

Joomla! languages installed:
fr-FR	French (fr-FR)
en-GB	English (United Kingdom)

Third-party components: None

Third-party SEF components: None

Plugins: None

Modules: None

Quelle erreur ai-je bien pu faire ?
Merci de votre aide

J'ai solutionné le problème. C'était simplement une question de flux RSS mal paramétré.
Mais à quoi correspondent les erreurs (have wrong collation of type utf8mb3_general_ci) qui apparaissent dans mon CR de config ?
Comment y remédier et les corriger ?

Bonjour,

Pour les erreurs "wrong collation of type utf8mb3_general_ci" c'est juste que Joomla ! par défaut depuis quelques versions définit les tables en utf8mb4_general_ci. Dans ce cas-là pour y remédier il faudrait corriger pour chaque table de Kunena et chaque colonne dans chaque table ce qui peut-être laborieux, avant faire une sauvegarde de ta base de données

Pour chaque table de Kunena :

Pour chaque colonne :

Pour plus d'informations voir: dba.stackexchange.com/questions/8239/how...utf8mb4-in-mysql-5-5

Merci pour l'information !
C'est effectivement un peu fastidieux de lancer toutes ces requêtes.
Si cela n'empêche pas  la base de fonctionner correctement, je vais laisser comme ça pour l'instant.
Je procèderai aux modifications quand j'aurai un peu plus de disponibilité pour le faire.
Encore merci pour ton aide.