Site on modx stopped working error error

Yesterday the site did not work, was error 500. The problem was lack of disk space. Hosters have cleaned mail removed archives. Performed diagnostics and repair of databases, a single table restore failed
Repairing tables
avt199_db.modx_event_log
error : Cant create new tempfile: ./avt199_db/modx_event_log.TMD
status : Operation failed
Then the hosts managed to correct the error without restoring the site.
Also for safety has updated the database server to version 10.3.22-MariaDB.
All perfectly worked.
A couple of hours ago there was a error, the site does not start. The hosts restored from backup, nothing gave the result:
"Unfortunately with the server not seeing the specific errors, there is only a recording

[root@avtoinstruktor199 www]# tail /var/www/avt199/data/www/lor_protect/logs/php_errors.log -n 2
[08-Mar-2020 22:31:35 Europe/Moscow] PHP Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50564 Library:100138 in /var/www/avt199/data/www/avtoinstruktor199.ru/manager/includes/extenders/dbapi.mysql.class.inc.php on line 93
[08-Mar-2020 22:31:38 Europe/Moscow] PHP Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50564 Library:100138 in /var/www/avt199/data/www/avtoinstruktor199.ru/manager/includes/extenders/dbapi.mysql.class.inc.php on line 93
Due to the upgrade of the database server, but it is unlikely that they can cause inoperability of the website. Therefore, without the help of a developer not to understand."

Need to run a website