Ladsgroup added a subscriber: Ladsgroup. Ladsgroup added a comment.
It happens because no page is defined for English Wikipedia in user_sandboxTemplate variable. (it only contains de.wp)
It would be good if we have a nice error message and then crashing like this.
TASK DETAIL https://phabricator.wikimedia.org/T87634
EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/
To: Ladsgroup Cc: Ladsgroup, jayvdb, Aklapper, pywikipedia-bugs