how to deal with this problem?
There appears to be a failure of the Microsoft server you are accessing in the country where you currently use OneDrive. There seems to be no choice but to wait for the server to normalize.
If you need to use it right away, you can access OneDrive through a proxy server in another country.
Actually，i have another account of onedrive,it can use,so??
YES, you can use any account (include the same account) at any time on RaiDrive.
Sometimes, it seems that this issue happens in a China account.
We think that the reason is from OneDrvie but not RaiDrive.
But we will keep track of this issue.