console error in my forum after upgrade to IPS4

[newAgeForum]

Hello guys ,, 

i have an error after upgrade to IPS4 that make my forum not work correctly, and it's not appear in all pages but it prevent users from reply in forum's topics

and prevent me make support request from my ACP 

and the error is : 
 

Quote

Uncaught SyntaxError: Unexpected token ( in JSON at position 30675

and i hope i can got some help here 

NOTE: i am not on live forum i am just trying to upgrade my forum to IPS4 in my local computer