Oxwall on cPanel issue (SyntaxError)

Hi there, I'm new to this forum.

I'm using Oxwall (social network software) on cPanel for a few days now and yesterday some functions stopped working. People can't change their avatar, drop down menu is not popping up if the cursor is over the user icon. I can't select/activate a new theme or save custom CSS in the Admin Panel of Oxwall (nothing happens when I click on the buttons). Also tabs on profile pages and some buttons are not working (simply nothing happens).

Since I'm new to coding I don't know what to do. If I inspect my site with Google Chrome it gives me errors like:

On my profile: SyntaxError: Invalid or unexpected token /user/Zadakine:2269
On my Admin Panel (Oxwall): SyntaxError: Invalid or unexpected token /admin:1780

How do I get rid of this error? Where do I have to look in cPanel to solve this?

 

Thanks for the fast answer. I already contacted my hosting provider. They couldn't do anything. Oxwall not responding thus far. But I found an error.log file. Could that be it?

This is the error:

Code:

[Sat Mar 11 10:16:00 2017] [ow_core_log] [Notice] Message: Undefined index: HTTP_USER_AGENT File: /home/animalcr/public_html/ow_core/request.php Line:137

This is at the line 137:

PHP:

        return UTIL_Browser::getBrowser($_SERVER['HTTP_USER_AGENT']);

So what's wrong in the code?