Everything seems to be working now!
Apparently the patching went wrong, and the new build (66,577) is not fully working for now.
As soon as you reboot your client, it gets updated to the new build, even though there was no new build announced in-game. In the new build, you can't enter WvW or PvP. It only works in the old build.
Update:
- It might be related to some connectivity issues
- Also, fractals seem to be broken (/u/RandommUser)
- Fix soon!
Update 2:
- The latest build has been fully pushed to the servers now and everything seems to be working again!