How to solve the problem with logging into the WordPress admin panel?

Question

WordPress

When you enter the administrative part, it does not let you in the control panel, or rather it does, but only no further than the settings of the Advanced Access Manager plug-in. Website on wordpress. He stopped understanding that I have administrator rights and does not display navigation in the control panel, the Advanced Access Manager access settings plugin itself does not allow you to configure anything.

Of the possibilities, only exit and re-enter and poke through the plugin settings.

I read about this problem and did not find anything in essence, although I tried a lot.

Renaming the plugins folder.
Registration of a new user with administrator rights,
Changed the value in the database to meta_value - a:1:{s:13:"administrator";b:1;},
Checked the rights and made sure that they correspond to the administrator's rights.

WP_User Object
(
    [data] => stdClass Object
        (
            [ID] => 1
            [user_login] => Misha
            [user_pass] => ***
            [user_nicename] => ***
            [user_email] => ***
            [user_url] => https://...
            [user_registered] => 2020-04-29 18:11:31
            [user_activation_key] => 
            [user_status] => 0
            [display_name] => Misha
            [user_level] => 0
        )

    [ID] => 1
    [caps] => Array
        (
            [administrator] => 1
        )

    [cap_key] => wp_capabilities
    [roles] => Array
        (
        )

    [allcaps] => Array
        (
            [administrator] => 1
        )

    [filter] => 
    [site_id:WP_User:private] => 1

One of the options for such a problem may be to change the hardware on the server or the operating system. This is related to memcache caching. I am clarifying this issue now.

What else could be the problem and what would you do in my place?

Answer 1

Have you tried deactivating plugins through the database?
wp_options -> 'active_plugins' -> Edit -> in the option_value field write a:0:{}
Save.
Trying to login to the admin.

Answer 2

Thanks, I tried it but no result.
I solved the problem by installing the latest version of WordPress, filling it with the old database, leaving some of the necessary plugins and transferring the theme.
But the source of the problem could not be found, the site left the problem, maybe someone came across and in the end it
will be possible to find the answer.