PM Not Submitting [B]

[Mooncalf]

Reported by: Azraeth.

Reported time (GM): 2018-08-23T15:25:40Z.
Encountered time: This morning (8:30 AM EST).

Bug location: Someone was trying to send a PM and tossed this at me via IM

Bug type: error message

Bug details: see screenshot

Further information: https://i.imgur.com/iFcB2cd.jpg