When attempting to send a mass message on the english beta cluster, an error is returned:
PHP fatal error: Declaration of JobQueueEventBus::doAck() must be compatible with that of JobQueue::doAck()
Steps to reproduce
- Go to Special:MassMessage
- Attempt to send a message
Note: as of 18:09 10 April 2019 (UTC), MassMessage still works on the normal wikipedia (example)