I have been able to get around this problem by entering configuration mode then typing no ip http server
Wait a few seconds then type ip http server
It takes a minute or two for the web interface to reset itself but you should have access to the web ...
I tried to go to your Reference link that documents the gap but received a 403 Forbidden error. Would it be possible to get the feature gap from you? Thanks.
Did you ever figure this out? I'm in the same boat, just uploaded a signed cert and broke SSL. I have a TAC case opened but anything you found would be helpful. Thanks.