Nextcloud crashed and won’t come up again after php8.1-update (Service not available (HTTP Error 503))

Dear Community,

my NexcloudPi-Instance seems to be broken and I have no clue what I can do to relive it.

What I’ve done before the crash:

  • apt update && apt upgrade (with php-8.1 updates)
  • Reboot

Basic details of my system (ncp-info):
NextCloudPi version v1.50.5
NextCloudPi image NextCloudPi_03-02-22
OS Debian GNU/Linux 11. 5.15.84-v8+ (aarch64)
automount no
USB devices sda
datadir /var/www/nextcloud/data
data in SD yes
data filesystem ext2/ext3
data disk usage 28G/917G
rootfs usage 28G/917G
swapfile /var/swap
dbdir /var/lib/mysql
Nextcloud check ok
Nextcloud version 24.0.8.2
HTTPD service up
PHP service up
MariaDB service up
Redis service up
HPB service up
Postfix service up
Internet check ok
public IP REMOVED SENSITIVE VALUE
public IP REMOVED SENSITIVE VALUE
Port check 80 closed
Port check 443 closed

output of my ncp-report (including config.php, nextcloud.conf):
https://privatebin.net/?123e1e529c0a6549#A4y95mvSAfPKUjMcay3XYXGLj17apQex85JzbRAQBMXA

output /var/log/apache2/nc-error.log:
https://privatebin.net/?7ca9341bb9958115#83TQ1jHjmzLmVqD2A5M35TchyxjP8oPodybZQ9u6LdeQ

If there’s anything I can do more support your help, please let me know :wink: .