Data breach

Similar to that error message but specifically had this web address on it. Plus, I don't store any passwords in my browser so unless google intercepts every password I type and sends it back to them, it flagged the address not my credentials. So no, not some site some where. Here. It specifically stated here. Also, my password on this site is unique to this site only.

um well being in IT you would know a screenshot and more complete info would be quite helpful...

Does this happen every time you login? Have you tried changing your password to see if it resolves the issue? What browser? Etc.