ActivityPub 연동된 Discourse 스레드가 외부 AP 클라이언트에서 접근할 수 없는 이유는?

[RokeJulianLockhart1 (Mr. Beedell, Roke Julian Lockhart)]

What the heck has occurred here? I have never written like the undermentioned:

RokeJulianLockhart:

Discuss this on our forum.

...and someone's taken a sledgehammer to my markup.