Not sure it's been addressed here (I'm not reading 194 pages.. lol) but I updated Unraid to 6.9.0 this morning. Everything went well until Plex tried to autostart, kept getting bad parameter. Checked log noticed Critical: libusb_init failed. Searched internet and everything was pointing to a database corruption issue.
Just so happened to look at my dashboard and noticed GPU Statistics was missing (it's done this before) so on a hunch I checked for new nVidia driver app. Once installed, I had to disable docker and then re-enable and Plex was up and running again. Also downloaded the new GPU Statistics App.
Just thought I'd post in case anyone else runs into this issue.