Hi, thank you for this wonderful port.

I was not able to use the latest Ubuntu build in releases.
So I build from the last released source. Building worked. After adding the bass libraries I could not start the game with the bass libraries.

Error message was:
./Freeserf.net/FreeserfNet/bin/Debug/libbassmidi.so: undefined symbol: BASS_GetVersion

I fixed it in the end downloading BASSMIDI 2.4.15.3 from https://www.un4seen.com/ and replacing the delivered libbassmidi.so. Now the game runs perfectly.

My system
Distributor ID: Ubuntu
Description: Ubuntu 25.04
Release: 25.04
Codename: plucky