You assigned a separate file system to ${MOUNTPOINT}, but in order for the system to start correctly this directory must be on the root file system.
Tmuddeḍ anagraw n yifuyla yettuɛezlen i ${MOUNTPOINT}, maca i wakken ad yekker unagraw akken iwata ilaq akaram-a ad yili ɣef unagraw n yifuyla aẓar.