I am having the same issue, I checked the error logs on the server and there was nothing there regarding ACF. I also tried deactivating my other plugins and that also did not fix it. The console error is:
Uncaught ReferenceError: acf is not defined
at post.php?post=39&action=edit:3109
Which seems weird, the only recent action I’ve taken regarding ACF is updating it to the newest version, is it possible the update caused this issue?
