Are you running PADD? There is an unresolved issue with v3.8.0.
https://github.com/pi-hole/PADD/issues/252
To mitigate, you can run PADD v3.7.1
This is the raw file
https://raw.githubusercontent.com/pi-hole/PADD/v3.7.1/padd.sh
Download and replace your PADD.sh