Hi, I have the same problem after updating.
I edited my resolv.conf, ran pihole -up, but still no change.
Here is my debug log: https://tricorder.pi-hole.net/3p8LlDgK/
Also, I ran sudo -u pihole pihole-FTL debug and noticed the following errors:
[2022-08-18 23:09:53.901 3774M] PORTFILE: Using /run/pihole-FTL.port
[2022-08-18 23:09:53.901 3774M] WARNING: Unable to write used port to file
[2022-08-18 23:09:53.901 3774M] (API might not find the port)
[2022-08-18 23:09:54.597 3774M] Successfully accessed setupVars.conf
[2022-08-18 23:09:54.598 3774M] listening on 0.0.0.0 port 53
[2022-08-18 23:09:54.612 3774M] listening on :: port 53
[2022-08-18 23:09:54.615 3774M] WARNING: Unable to write PID to file.