Thank you for your answer, I had installed LITESPEED for caching , I deactivated that plugin and now I can enter in the mobile menu.
Is it better to delete LITESPEED?
What plugin I should intall for caching?
Should I use plugins, only which are listed INCLUDED PLUGINS in Xstore theme?
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.