When attempting to enter a group activity code for a collaborative
interactive, one of the following error messages is displayed. Opening a
collaborative interactive via URL appears to work correctly, but it would be
useful to have the option to enter a code as well. The errors are either:
Something like "unfair-incident is a group for a different activity. It is
a group for the cocoa activity”, when you are opening the cocoa activity,
or
The less helpful and ever-popular “internal server error"
As originally reported by Chris Bujara: