Customizer Not Working – And Theme Conflict

Hi,

I can’t use Customizer anymore, and have been getting 502 gateway errors with this and other elements of the site.

I deactivated all plugins, and none of them fixed one issue (issue was buttons not working on Safari), then I changed themes – to 2017 theme and it worked.

I tested and both default “parent” and child Buddyapp theme caused this issue. (buttons not working on Safari)

You can see for yourself, a page where buttons don’t work on Safari is https://scenester.tv/join

Also, now i have this Customizer not working issue also…   theme related. See screenshot

Any possible insight into this?