Der Fehler tritt ebenfalls auf Server s42 auf. 20220717 15:32:34 Error Core The given key was not present in the dictionary. Message: The given key was not present in the dictionary. HResult: -2146232969 Source: mscorlib StackTrace: at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (T...

I fixed it this way:
From the Mono Download page:

The package ca-certificates-mono should be installed to get SSL certificates for HTTPS connections. Install this package if you run into trouble making HTTPS connections.

Because your method creates 100% cpu usage on one core, I use the following ExecStart to fix it:

ExecStart=/usr/bin/screen -DmS mfbot /home/ubuntu/mfbot/MFBot_Konsole_ARM64


This way you can also control the bot in screen.