Question Cannot SEND post on forum

maybe I don't understand you correctly
so you make a new topic in kunena?
And expect everyone on your forum to receive a message via E-mail that a new topic has been created in Kunena?
or do you mean that administrator/administrator does not receive an E-mail.
Or do you get an error message or warning that something is going wrong.

"so you make a new topic in kunena?
And expect everyone on your forum to receive a message via E-mail that a new topic has been created in Kunena?" YES

YES - new topic was created and it is here: " lapeercountyconcertchoir.com/index.php/c...choir-promotion.html " --- but no one (including me) received a notice that it was created.

+++++++++++++++
I created a new category for this topic. Do I have to re subscribe every one to the new topic? +++++++++++
Does the "have wrong collation of type" in red in above file mean anything?

How do I get everyone subscribed to the new category - maybe that is the problem.

maybe you can do that administrator>kunena>user>
Kunena Forum: Users there you can select users and with the button Subscribe users to categories:

I just remembered - On the joomla 3 site I always used a module called ASK to subscribe new members to the forum - but it is not available for joomla4.

So the question is - how do I subscribe all members to a category as a moderator from the back end?

as well, a user who clicks on a category should also
should see a Subscribe button below to Subscribe to that category