Steve Seeley first notified me of this minutes ago on Twitter saying “by chance is the Google my business login taking you to a 404?”
Yep, I cannot access it at all right now. Hopefully it will be back very soon but watch the complaints come in…
The big thing to note is that you are not alone, many cannot access it right now.
Forum discussion at Twitter.
Update: At 12:20pm EST, it started working again, at least for me.