Impossible to login

Hi, I was connected with Onedrive with one account A and I could see it in my File Explorer.

Now I had to close that account (external email) and I created a new account B (outlook.com).

I unsync the account A ... but now I can't connect account B the loading page of "Microsoft OneDrive" icon is not working and ... I can't see my onedrive in the File Explorer... 

Any idea?

And I have not started yet to move all file from onedrive account A to onedrive account B
thanks for your help

Francesco