Hi shyim,
The "wrong parameter" error usually means that you do not have Boxcryptor access to this file. Did you check the Boxcryptor permissions on that file to confirm that?
If you still have trouble with the latest version (https://www.boxcryptor.com/en/download/?platform=windows), please let us know at support@boxcryptor.com. Note that we cannot ensure Boxcryptor is running stable on Windows versions coming from the Insider Preview program.
Kind regards,
Florian