I am trying to encrypt my application and to establish optionally an encrypted communication.

As I am on CodeSys 3.5.16 SP20 I am following this guide for encrypting the application: https://help.codesys.com/webapp/_csa_encrypting_bootapplication;product=codesys_security_agent;version=1.2.0.0

I tried both ways - none of them worked for me.

I show you some pics of my settings (manually added):

This is the error, when trying to download the Application:

If I go one step further and try encrypted communication following this guide:
https://help.codesys.com/webapp/_csa_configure_encrypted_comm_with_device;product=codesys_security_agent;version=1.2.0.0

I get the following error:

How can I use encryption? Maybe a hint for the solution: I have deployed the same Application on several Raspberry Pis. They all have the same hostname for convenience purposes. At any time each individual RPis are on different subnets.

Thanks for your help!