I just can't get calibre to autostart anymore either. After I deleted the old configs where GUAC_ was still in and redownloaded calibre, it worked for 3-4 startups, but I subsequently changed the config folder location to my nvme drive and ever since I'm back to square one where I have to manually start the webUI once (changing it back does nothing). I'm still relatively new to linux/unraid/docker, but I guess it says it can't autostart because it can't find the command? Any ideas what I could try?
(And not that it matters to me anymore, but maybe disable_auth true could be a good addition to the default template?)