I ask the MySQL guru for help. This error is generated by pma.
What to do?

Answer 1, authority 100%

In the screenshots, the error is “Access denied for user root (using password: NO) ” and appears “controluser “.

You need to set the correct username and password for controluser ‘a . They are used to connect to the phpMyAdmin configuration storage , where settings for additional functions are stored.

Configuration storage is optional, phpMyAdmin can work without it.
Therefore, you have two paths:

• Turn off configuration repository: $ cfg ['Servers'] [$ i] ['pmadb'] = null; in config.inc.php .

• Configure controluser ‘a : create a user in MySQL, grant him a specific set of privileges, then add his username and password to config.inc.php :

  $ cfg ['Servers'] [$ i] ['controluser'] = '& lt; USERNAME & gt;';
  $ cfg ['Servers'] [$ i] ['controlpass'] = '& lt; PASSWORD & gt;';
  

Answer 2, authority 14%

I turned off the configuration storage, and then turned it back on, it helped.