After transferring a copy of the site (Wordpress CMS) to a subdomain, it does not load. Is a white screen displayed?

Question

WordPress

Tried to resolve this issue with Google - nothing helped.
Wp-config is configured correctly, otherwise it gives an error connecting to the database.
Previously transferred the same copy of the site and everything works.
I tried to re-upload folders with files, in order to avoid losing some file. Did not help.
Please advise how to resolve this issue.
Website address:
d.babisdaniilidis.com

Answer 1

The hosting support service solved the issue with loading the site by disabling plugins. Some give a glitch. How to calculate it?

Answer 2

Go to phpmyadmin and in the settings table specify the new site address.