Hello, I have a problem with using customize mode on my web. WordPress shows me blank page or critical error. The problem exists only while I am using GP Premium plugin. With free version of theme customize mode works perfectly. Do You known why?
a white screen generally means the PHP Memory Limit of the site needs increasing. Can you check the server memory limit – i would recommend a minimum of 256mg
The issue is generally memory related.
This can be at the server level, for example if you have a lot of Plugins installed that consume that memory you may need to increase ( my base development sites i start with 768meg and round it down after completion ).
It can also be a local browser memory issue where the localStorage/caches are overloaded.
Can you first test without any other plugins enabled ?