Pihole offline - lost connection to api

[3gwvqb543w]

Hello,
after i updated the core version from 4.3 to 4.3.1 py-hole says "lost connection to api" and "DNS service not running" and "FTL offline".
https://tricorder.pi-hole.net/vf0yi4n88s
how to fix it?

regards

[Mcat12]

What is the output of these commands?

ls -l /etc/pihole/pihole-FTL.db
sudo service pihole-FTL status --full --no-pager

[3gwvqb543w]

-rw-r--r-- 1 pihole pihole 1634304 Jun 30 22:26 /etc/pihole/pihole-FTL.db
● pihole-FTL.service - LSB: pihole-FTL daemon
Loaded: loaded (/etc/init.d/pihole-FTL; generated; vendor preset: enabled)
Active: active (exited) since Sat 2019-06-29 23:00:26 CEST; 23h ago
Docs: man:systemd-sysv-generator(8)
Process: 8828 ExecStop=/etc/init.d/pihole-FTL stop (code=exited, status=0/SUCCESS)
Process: 8868 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 4915)
CGroup: /system.slice/pihole-FTL.service

Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

But pi-hole is working now.
I tried several times "pihole -r" and after some tries its working again now.

regards