Same issue. The only way to make the apps working again is by disabling Host path safety checks or uninstalling reinstalling reconfigure all your apps.
If someone want to replicate the issue install truenas scale angelfish>install Plex from official >Map some folders SMB's >update to bluefin and now Plex app will be deploying forever unless you uncheck Host path safety check
If someone want to replicate the issue install truenas scale angelfish>install Plex from official >Map some folders SMB's >update to bluefin and now Plex app will be deploying forever unless you uncheck Host path safety check