I have tried everything:
1. Deactivate all of your non-GP plugins – does the issue still exist? If not, activate each plugin one by one until the issue happens again. This way, you can pinpoint the problem plugin.
Same problem with all the plugins deactivate.
2. Turn on WP DEBUG – do any errors display in your Dashboard or on your live site?
No errors.
3. If you’re getting a white screen while Customizing or somewhere else, try increasing your memory limit.
No white screen.
4. Activate the core WordPress theme (TwentySeventeen) – does the issue still exist? If so, we know it’s not a GeneratePress specific issue.
No problem with TwentySeventeen
5. Check your error_log (or ask your hosting to) – are there any big errors in there?
No big errors there.
How can I do?