We are currently using version 2.50+ Build 160718.
Apologies for asking such a basic question but I know I'll be asked for a solution.
I have a number of users creating surveys, and they have reported that when they try to delete a question group, the page hangs (in Firefox), or generates an http error 500 (in Chrome).
Does anyone know why this might be happening and where I can go/what I can do to fix it?