Did you restore from a backup? If so, you might want to try reflashing the Rom and not using a backup to see if that helps. There's a known issue with treble ROMs that makes it so that restoring from backups breaks a lot of things.
* Your warranty is now void. * We are not responsible for bricked devices, dead SD cards, * thermonuclear war, or you getting fired because the alarm app failed. Please * do some research if you have any concerns about features included in this ROM * before flashing it! YOU are choosing to make these modifications, and if * you point the finger at us for messing up your device, we will laugh at you.