Reboot System 20012 or 20013 Errors
As the error suggests, try restarting the computer.
If the issue remains, ensure you are updated to the latest available version of WebDrive and then restart the computer.
the connection still won't succeed and you are seeing the same error,
it may be due to a drive letter already being used or not available. Go
into the main app Settings and enable the option for "Automatically
select drive to use" and then try the connection again. This setting will have WebDrive first attempt the assigned drive letter you've chosen for the connection, and if it fails for any reason, WebDrive will instead use the first available drive letter on your system.