[SNAPSHOT] After snapshot restore I cannot reach /wp-admin/ in by dashboard.

After snapshot restore I cannot reach /wp-admin/ in by dashboard. I see this message:
Sorry, you are not allowed to access this page.
During the chat we try:
- plugin/theme conflict via FTP
- create a second superadmin via mu-plugins - same results

Debug.log show this:

[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/menu.php on line 167
[22-Jul-2018 20:35:56 UTC] PHP Notice: Undefined offset: 2 in /var/www/html/wp-admin/includes/plugin.php on line 1560