We're so sorry to hear about the trouble. Please try the steps shared below:
Sign out of the Creative Cloud Desktop app and XD app.
Close CoreSync and all Adobe related services.
Reboot the computer.
Sign back in on Adobe CC Desktop app and please ensure that you are signing in with the same email address with which you are signed in on the Windows machine at work and check if you are able to open the file.
In case if it still doesn't work, please share the details asked by Muklesur, we'll try our best to help you with it.