I upgraded the owncloud version from 10.0 to 10.3, using the upgrade document operation, and viewing the log shows that the upgrade failed.
owncloud_1 | 2019-11-16T14:49:47.077057000Z 2019-11-16T14:49:47+00:00 Repair warning: You have incompatible or missing apps enabled that could not be found o
r updated via the marketplace.
owncloud_1 | 2019-11-16T14:49:47.077558000Z 2019-11-16T14:49:47+00:00 Repair warning: Please install or update the following apps manually or disable them wi
th:
owncloud_1 | 2019-11-16T14:49:47.078097000Z occ app:disable files_videoplayer
owncloud_1 | 2019-11-16T14:49:47.078791000Z 2019-11-16T14:49:47+00:00 Repair warning: For manually updating, see https://doc.owncloud.org/server/10.3/go.php?
to=admin-marketplace-apps
owncloud_1 | 2019-11-16T14:49:47.079561000Z 2019-11-16T14:49:47+00:00 OC\RepairException: Upgrade is not possible
owncloud_1 | 2019-11-16T14:49:47.080015000Z 2019-11-16T14:49:47+00:00 Update failed
owncloud_1 | 2019-11-16T14:49:47.080483000Z 2019-11-16T14:49:47+00:00 Maintenance mode is kept active
owncloud_1 | 2019-11-16T14:49:47.080963000Z 2019-11-16T14:49:47+00:00 Reset log level