I’m having this “Plugin File Install Errors” problem too on Unraid 6.12.3. If the system reinstalls VM Backup automatically after a reboot, in my case, it is for sure going to fail. I live in China, need to use a proxy to access GitHub. After rebooting, the Docker service is initializing so my proxy is not yet available. If the system reinstalls VM Backup at this point, it is going to fail.