Why would I read the patch notes from four patches and 3 weeks ago when the issue only started happening today, the day after the most recent patch?

Anyway, that message makes it sound like the character cannot be played at all, although from what people here are saying it actually is playable. I would suggest a more accurate descriptive phrase instead such as "Unable to display character model due to server congestion." which doesn't imply that the character is wholly unavailable.