What does Error Code 1 mean?

Error Code 1 means an unknown error has occurred, but there are a couple of other checks that may help you get OneDrive working again.

For More Information Please Refer: https://support.office.com/en-us/article/what-do-the-onedrive-error-codes-mean-f7a68338-e540-4ebf-ad5d-56c5633acded