Hi everyone,
after having successfully installed and used Nextcloud for many years, hosted on an old laptop of mine, I decided to finally migrate my server to a raspberry pi for several reason (e.g., that laptop is really, really old and might even be a fire hazard now).
I followed the official guidelines to migrate my Nextcloud instance, and overall everything seems to have worked well, except for Step 5 where I tried to run the command maintenance:data-fingerprint. At that point, occ refused to run, and gave the following message:
> sudo -u www-data php occ maintenance:data-fingerprint
An unhandled exception has been thrown:
Error: Interface "OCP\Authentication\Token\IProvider" not found in /var/www/html/nextcloud/lib/private/Authentication/Token/Manager.php:39
(my nextcloud instance is in /var/www/html/nextcloud, but that was also the case for the original server; never produced any problems)
This problem also occurs if I try to turn off maintenance mode.
I couldn’t find any information about this error anywhere on the web; I checked the folder /var/www/html/nextcloud/lib/private/Authentication/Token, and the file IProvider.php was in it, so I am unsure what the problem might be… does someone have an idea?