1) Security Image did not shown during user login.
2) QR Code did not shown during provisioning
The logs are taking up a space of the disk and this will cause issues to all the services running if the size is small. Besides, for all the activities of adding the users/ authenticating process, this will taken up some spaces to the database as well.
Since, the current disk space is 15GB, we would suggest if you can increase the storage size of the disk to avoid the same issue from happening again in the future.