PPM does not start - Symphony error

[dspreitz]

Hi,
I did a fresh install of bookworm on a raspberry pi and then followed the volkszähler installation instructions:
https://wiki.volkszaehler.org/software/middleware/installation

1st bug that I found is, that /home/pi/volkszaehler directory need o+x permissions. Otherwise apache2 will not work (redirect from /var/www/ will fail due to permissions).
drwxr-xr-x 13 pi pi 4.0K Apr 17 13:01 volkszaehler.org fixes this problem.

2nd problem is, that the ppm will not start correctly:

pi@raspberrypi:~/volkszaehler.org $ /usr/bin/php /var/www/volkszaehler.org/vendor/bin/ppm start -c /var/www/volkszaehler.org/etc/middleware.json --cgi-path=/usr/bin/php

Read configuration /home/pi/volkszaehler.org/etc/middleware.json, modified by command arguments.
/home/pi/volkszaehler.org
+---------------------------+--------------------------+
| bridge                    | HttpKernel               |
| host                      | 127.0.0.1                |
| port                      | 8080                     |
| workers                   | 8                        |
| app-env                   | dev                      |
| debug                     | 0                        |
| logging                   | 1                        |
| static-directory          |                          |
| bootstrap                 | PHPPM\Bootstraps\Symfony |
| max-requests              | 1000                     |
| max-execution-time        | 30                       |
| memory-limit              | -1                       |
| limit-concurrent-requests |                          |
| request-body-buffer       |                          |
| ttl                       | 0                        |
| populate-server-var       | 1                        |
| socket-path               | .ppm/run/                |
| pidfile                   | .ppm/ppm.pid             |
| reload-timeout            | 30                       |
| cgi-path                  | /usr/bin/php             |
+---------------------------+--------------------------+
Starting PHP-PM with 8 workers, using StreamSelectLoop ...

--- Worker 5505 stderr ---
**Uncaught Exception: Symfony Kernel class was not found in the configured locations. Given: '\AppKernel'**
Application bootstrap failed. Restarting worker #5505 ...

Any ideas how to fix this?

[dspreitz]

My raspbian version is following:

pi@raspberrypi:~ $ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"