Cinder driver does not properly initialize, with errors in /var/log/cinder/volume.log like: 2021-11-24 12:06:44.260 26 ERROR cinder.volume.manager [req-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx - - - - -] ...Cinder driver does not properly initialize, with errors in /var/log/cinder/volume.log like: 2021-11-24 12:06:44.260 26 ERROR cinder.volume.manager [req-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx - - - - -] Failed to initialize driver.: TypeError: can only concatenate str (not "NoneType") to str
