Problems after upgrading MySQL to 5.7

Hello, I'm in panic

I have dedicated Hetzner server with Debian 7

I need to instal Magento 2.0, and I could not do that because I did not have proper PHP and MySQL version.

Firstly I upraded Plesk version from 12.0 to 12.5, and after that I updated PHP without problems.
After that I updated Mysql with this tutirial
https://kb.plesk.com/en/127962

But after that problems started and I don't have idea how to solve it.
Few sites works fine, but one the most important not.
Also...

Problems after upgrading MySQL to 5.7