backend components for SMS on Oxygen

I took off all google apps and oxygen telemetry using root, but apparently I also took off something important. I'm now receiving all SMS about half an hour late and I can't send any. This problem persists even if I manually open the app. I changed the default SMS app to Signal, so I tried to revert to the original 'messages' app by google, but that crashes on launch. I'm at a loss finding out what essential component I must have removed. Can anyone help out?