Can't connect to DB after reboot from PHP

[bulent ozgul]

Hi,

First of all this is my first post. I Googled nearly for about 1 month but couldn't find a solution.

I installed HESK on my server. It is a free ticket system. It runs on windows. The codes are written in PHP.

The problem:
When MySQL restarts the website couldn't connect to the database.

Error message:
'Access denied for user 'root'@'localhost' (using password: YES)'

To solve this problem:
When I connect once with a user from Mysql workbench all the PHP pages can connect to the DB.

So this means after each reboot I have to login once from workbench and then everything works fine.

Is there a missing configuration, or is it a bug?

Operation System: Windows 2012 R2 Standard
MySQL: 8.0.27 x64
web server: iis
web page language: PHP

Thank you