Screenshot shows login with user ispconfig. But you wrote the problem is with user root?
Check with command line mysql on the secondary dns server the...
This is a link to answer to similar question:
Did you use LE so many times you hit the rate limit? https://letsencrypt.org/docs/rate-limits/
Not a bug. PHP version selection works only for PHP modes PHP-FPM and FastCGI. See the howto you followed to install the extra PHP versions.
If I may make a suggestion to @Jeremy007 : Find someone you trust and knows his or her way about name service. Tell that person the real domain...
If postfix was working previously, compare those configuration files from before. Show diff between then and now.
What does systemctl status mysql show?
At least in Debian and Ubuntu MySQL configuration files are in directory /etc/mysql.
Only the database should be copied over to the target host. Seems it is simpler and less change for disaster if I just dump the database, copy...
Are you using httpS url now?
Check logs for errors, maybe ISPConfig can not access the database.
Each database separately. The backups look like this:
Debian GNU/Linux has https://packages.debian.org/stretch/automysqlbackup
Can't see anything starting at 03 hours. But ispconfig/cron.log shows nginx being stopped. Can it be some other host starts something affecting...
Separate names with a comma.