Hello, any of my community members (including myself) can't invite some categories. When this action is performed we receive this error:

Sorry, there is a problem

Something went wrong. Please try again.

Error code: EX2

Can someone tell me what is wrong?

i select english langueage and error gone, how fix it , to work without this error in using langueage?

its because when u upgrade and make in french u need to check every forum name, BDD of page .. if the title is present in french  

no, this error come after 20 time when I or some active member invite page! all is translated already!