I am having a similar problem.
After updating WordPress a week ago, I can no longer access my admin page – every time I do I get an error page. I’ve tried clearing cookies and cache but had no luck, and wondering if it’s the update causing the issue. In any case, I can’t access the admin at all to be able to try to fix it.
I have no idea how to even begin to fix this, and I would appreciate any help!
