You're using macOS and when trying to create a backup or restore a backup and you always get an error. The error you are seeing is "Unable to create target path under /Volumes/, see website FAQ section.". The reason you get this error, is because macOS has tightened up security in macOS Catalina and higher. Traditionally you only had to allow the Vimalin main program "Full Disk Access". The worker process would get these credentials as well, because it is part of the Vimalin bundle. After some security updates however, this is no longer the case and you have to allow the vimalinWorker process "Full Disk Access" as well.
More details on how-to fix this are in the following forum post: Important: macOS security update breaks Vimalin functionality