When I went to run that command, it failed with an error of not having enough space, this lead me to investigate the minimum free space setting of the share. Once I corrected that issue I was able to run the backup successfully!
Thank you for pointing me in the in the right direction!
I keep running into this fatal error when try to start the container after I move the openvpn config files into the folder. I'm trying to use ProtonVPN as well.