I spotted it. In content areas, WordPress changes straight quotes to curly ones. It doesn’t make much difference to humans, but to computers it’s as different as “a” and “w” are. The error had indicated the email address was wrong, but I suspect that was to throw off would be hackers since it was actually the password.
I downloaded the PNG format of your logo and added it back. That seems to have it there. If you run into trouble, let me know.