CUNY Academic Commons

Is this by any chance related to this ticket - http://redmine.gc.cuny.edu/issues/3788 ?

Sort of. The cac-yourls plugin has a security mechanism that prevents one user from requesting a shorturl that matches another user's user_login. There was an error in that mechanism that was preventing people from claiming their own user_login as a shorturl. The error is probably indirectly due to the fact that in the previous implementation, users' shorturls were automatically generated based on their login, so the self-check would have been superfluous.

This should be fixed in https://github.com/cuny-academic-commons/cac/commit/e6f7b71b500511307f65d94f3634a9df6e8097f2. You can inform the user to give it another try after tomorrow's release.