Debian 12/Proxmox 8 - apacheds.service - Apache Directory Server - error on start after clean install...?

Question

there is a Proxmox 8 installed manually on clean Debian 12 (packages up to date).

We want to run a basic LDAP for numer of apps thus there was an idea to deploy it directly on host and I've executed a basic command:

apt-get install apacheds

It also installed some additional dependencies with default-jre-headless as well.

However apacheds was not starting due to error:

systemctl status apacheds
× apacheds.service - Apache Directory Server
     Loaded: loaded (/lib/systemd/system/apacheds.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Mon 2024-05-20 22:02:06 CEST; 1min 20s ago
   Duration: 134ms
    Process: 351775 ExecStart=/bin/sh -c exec              ${JAVA_HOME}/bin/java ${JAVA_OPTS}                -Dapacheds.controls=${ADS_CONTROLS}               >
   Main PID: 351775 (code=exited, status=1/FAILURE)

May 20 22:02:06 lab30 systemd[1]: Started apacheds.service - Apache Directory Server.
May 20 22:02:06 lab30 sh[351775]: Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
May 20 22:02:06 lab30 sh[351775]:         at org.apache.directory.server.UberjarMain.<clinit>(UberjarMain.java:48)
May 20 22:02:06 lab30 sh[351775]: Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
May 20 22:02:06 lab30 sh[351775]:         at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
May 20 22:02:06 lab30 sh[351775]:         at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
May 20 22:02:06 lab30 sh[351775]:         at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
May 20 22:02:06 lab30 sh[351775]:         ... 1 more
May 20 22:02:06 lab30 systemd[1]: apacheds.service: Main process exited, code=exited, status=1/FAILURE
May 20 22:02:06 lab30 systemd[1]: apacheds.service: Failed with result 'exit-code'.

After that I've manually installed the full JRE with command: apt-get install default-jre and also manually exported the system-wide: JAVA_HOME=/usr/lib/jvm/default-java

But apacheds error stays the same and LDAP is not even starting. Nor any other idea so far didn't help resolved the apacheds starting problem and honestly speaking I don't know what to do next while this is all on original packages from built-in repositories and that should work right after installation out of the box and it's a bit suprising that we're having such issues nowadays on Debian 12.

Could you please help me with resolving the issue and making the basic LDAP from apacheds running under Debian 12/Proxmox 8?

Cheers, K.