I think I have the same problem too. I just manage to install it, and try to logout and come back. Same problem occurs. could not post comments. (Reading comments are fine).

And also: The 3 checkmarks has been ticked. Verified using the firefox.
So could be a bug.

Update: rebooting seems solve my problem. Or either the update is not real time. So needs to wait for time lapse. before the application privacy took into place.