The PTR is currently offline under maintenance during which time an entire wipe will take place. When back online there will be a new patch and the notes for those will be posted some time soon after. Full details from Blizzard CM.
To facilitate this wipe and PTR patch, we will be performing maintenance on the PTR starting around 11:00 a.m. PDT. We expect this maintenance to last for approximately 2 hours, concluding sometime after 1:00 p.m. PDT. After maintenance has completed, you will be able to copy your live characters over to the PTR immediately (even if you previously had a Character Copy cooldown active).
Please note that this wipe will not affect your characters in the live retail build.
Thank you for helping us continue to test out and improve the content in our 2.1.0 PTR. We hope to see you back in there after maintenance has concluded!
May your deeds of valor be remembered.
Edit: The PTR patch notes may not be available after the next build is deployed. They’re currently in progress, and will be posted once they’re finalized.