My Cloud Mirror access is impossible via logging in with network credentials for my device.

I can not turn on file history in Windows to organize/ access the files from this HP8000 Elite PC.
I have tried every ID and password combination I know and nothing works. For about 2 years now, no kidding.
Something happened that disallows my access and a window keeps popping up asking for my network credentials to gain access to My Cloud Mirror..
I am baffled --- any guidance will be greatly appreciated.
I do not even know if I am asking the right question, but I can not access my My Cloud Mirror (NAS) from this WIN 10 pc and can access WD My Cloud Mirror from all other devices mobile and tablets ...

Please advise..