Upon upgrading to Moodle 3.5.2 we are receiving the error Sorry, but you do not currently have permissions to do that (Send messages to any user) when a teacher or manager attempts to message students. This occurs when trying to message from the participants screen.
The messaging system is enabled in Advanced features, the teachers have permissions to send messages to multiple recipients, and the default message outputs are enabled with email set as the permitted default for online and offline.
Does anyone have a suggestion on what permission setting might cause this? Messaging was working prior to the update.