pull request merging erroring out

I'm trying to merge https://bitbucket.org/pidgin/main/pull-requests/185/enables-pidgin-to-display-urls-attached/diff and it just spins forever.

Upon looking at the network responses, I'm getting 500's back with the following output

{{{"type": "error", "error":

{"message": "pretxncommit hook failed", "id": "0c624c098b244a8e865f683a7f915566"}

}}}