Moodle 3.5
In Moodle messages If we set "Prevent non-contacts from messaging me" and a non-contact tries to send a message we get the following error message: "UserXXX only accepts messages from their contacts." which is OK... The problem is that if we set the debug messages on (even with display off) we get some javascript error messages displayed on the error message window.
Sent an image as attachment when testing on moodle demo Mount Orange School.
I don't know how to correct this... but let me know if I can help in any other way.
Best.
susana