MySQL Manager NOT working

Hello,
I'm newbie and my knowledge about managing a server is very low.
I have installed CW7 some while ago and everything was okay. But now I got a problem with MySQL Manager and the list of database and users are not shown. I'm not sure but probably because I updated centos (yum update), however still database work
I found the below article with this regard, which is exactly about my problem:
https://wiki.centos-webpanel.com/mysql-manager-not-working

When I try mysql --version , I get an error message:
unknown variable 'max_user_connections=45'

How can I fix this problem?
If it is possible, guide me in simple language and step by step, as my knowledge in very low in this field.

Thanks

I could fix the problem for roor by adding [mysqld] to /etc/my.cnf  and it works now.
But for one of my accounts, still it doesn't work and it just keeps loading.
Also I can not access to phpMyAdmin through accounts, but I can access through root

Screenshot:
https://ibb.co/yBVtX9r

we'll check it and there will be some update.

Just wanted to add that in that account, which keeps loading for database and users, the same happens for the domain list, too and I can not see the domain list there.

For the other accounts, I can see database, users and domain lists.

In None of my accounts, I can access to phpMyAdmin (timeout error), except from root.

Thanks again for your help