Helm install successful - "internal server error" in browser

Dears,

I followed this guide

to install the helm chart.

I have changed the values.yaml

# 154      APP_FULL_BASE_URL: https://passbolt.local
sed -i '/# -- Configure passbolt fullBaseUrl/!b;n;c\
    APP_FULL_BASE_URL: https://passbolt.domanin.tld' $SEDFILE

After the helm install…

 k -n passbolt get all

on the cluster, the deployment, services, etc look good

I created a traefik ingressroute to the passbolt service.
Traefik Dashboard Shows the ingressroute working and reaching the 2 pods at :443
Traefik handles the letsencrypt certs.

When I Point my browser to https://passbolt.domanin.tld
I just get: Internal Server Error
The browser showing the valid letsencrypt cert for passbolt.domanin.tld

I did the healthcheck

www-data@passbolt-depl-srv-797f8c8c9c-z777n:/usr/share/php/passbolt$ ./bin/cake passbolt healthcheck

[FAIL] 8 error(s) found. Hang in there!
Some Errors are in section: GPG Configuration
But
[PASS] The application is able to connect to the database

Checking the logs

k -n passbolt logs pod/passbolt-depl-srv-797f8c8c9c-rt98g

shows repetitively

10.244.3.1 - - [23/Aug/2024:09:38:02 +0000] "GET /healthcheck/status.json HTTP/2.0" 200 220 "-" "kube-probe/1.28"
2024-08-23 09:38:02,130 INFO reaped unknown pid 15603 (exit status 0)

With DEBUG: true I get one additional SSL error

10.244.1.1 - - [24/Aug/2024:05:01:51 +0000] "GET /healthcheck/status.json HTTP/2.0" 200 220 "-" "kube-probe/1.28"
2024/08/24 05:01:53 [info] 66#66: *53 SSL_do_handshake() failed (SSL: error:0A000412:SSL routines::sslv3 alert bad certificate:SSL alert number 42) while SSL handshaking, client: 10.244.2.175, server: 0.0.0.0:443
10.244.1.1 - - [24/Aug/2024:05:02:01 +0000] "GET /healthcheck/status.json HTTP/2.0" 200 220 "-" "kube-probe/1.28"
2024-08-24 05:02:01,363 INFO reaped unknown pid 225 (exit status 0)

I have tried for quite a while…
Can you assist me with a good idea how to fix.
Help is much appreciated. Many Thanks.

eta1st