Error 401: Unauthorized

[Surapong]

I have saved a lot of documents to my cloud drive and am now unable to access it. All my work is gone!

Last week, I scanned some Lego box images from my own in-stock inventory to create vector art later. Now this week I cannot access my cloud documents. I am the only user on this account and the administrator. I get an error message on my PC/MAC. 

How do I access my cloud drive then? 

This picture shows there are files.

But when I click the images I get this message. I cannot access this feature on any of the Adobe apps.

[Surapong]

I tried signing out and also creating a new password. I got these messages and noticed file syncing has been disabled. I have a single-user student account. 

[Peru Bob]

I know that it doesn't help you with this issue now, but you might want to consider Schofield's Second Law:

https://www.zdnet.com/article/follow-schofields-three-laws-of-computing-and-avoid-disasters/

[Peru Bob]

Do you have backups?

[Surapong]

Only through emails I sent to my professor, but other files are gone.