Sorry to be negative about this excellent plug-in that incorporates much hard work. But I had a serious nightmare with a "blank login page." = Cannot log-in to wordpress
Finally paid someone to reinstall my WordPress. He said the problem was AG Custom Admin. Maybe he was wrong?
I suggest a prominent reference to this potential problem--and how to fix it--on the Description page. Something like this:
(Important note: AG Custom Admin should always be updated before updating WordPress, or you may be unable to login to WordPress. If having this problem click here for the solutions.)
Perhaps I am wrong? This was not caused by AG Custom Admin?
P.S. Argonius has replied appropriately to this matter, saying:
Argonius also assures to become more clear about this in future. Click here for detailed response at Argonius.com.