It is telling you the problem:
Better check your database as it seems tables are missing or the file/folder permissions are still messed up and MySQL can not read the files that hold the database information. (/var/lib/mysql/)
Permissions for /var/lib/mysql/ files and folders are:
Owner: mysql
Group: mysql
Permissions: 0700
Code:
Table 'sentora_core.x_settings' doesn't exist'
Better check your database as it seems tables are missing or the file/folder permissions are still messed up and MySQL can not read the files that hold the database information. (/var/lib/mysql/)
Permissions for /var/lib/mysql/ files and folders are:
Owner: mysql
Group: mysql
Permissions: 0700