I have developed a webpart, deployed to local tested successfully. I've then added the WSP to my live environment (SP 2010 Online) but when I try to add in my webpart to a page i get the following pop up error.
"Sandboxed code execution request failed error"
Very strange...so I thought it may be my code...so I go through the whole process again but with just a simple webpart with NO code, just my name in a H1 tag.
I have been developing webparts like these for the last year without any kind of issue. Has anyone experienced this before?