@Vincent-TP I have the same issue on a dedicated ubuntu 22.04 headless w 16GB RAM and the only other function of this box is simple SMB file sharing in a small network.  Regardless of the machine's state/usage/memory/cpu status, the TPEAP service always hangs when stopping or restarting, and provides the exact same error as OP.

Even after a fresh reboot, i can replicate the behavior.

  @edwinj 

Which openjdk version do you use?

Today I tried it with the openjdk version 11. No I'm able to stop the tpeap service.

With openjdk 21, I was not able to stop the tpeap service.

I did following to switch the openjdk version (of course use at your own risk :))

Install openjdk version 11:

sudo apt install openjdk-11-jdk-headless

Find Java Path:

sudo update-java-alternatives --list

Update Java path:

sudo update-java-alternatives --set /path/to/java/version/from/above/output

After a reboot, the TPEAP service started with the openjdk version 11. After that I was ablt to stop and start the service.