On fresh OS install Ubuntu 16 LTS
I had 1 coin($PAC coin) working for a while before it crashed. So i went ahead and reformatted and reinstalled OS and started clean. Heres the errors that it 

/miningcore/build$ dotnet Miningcore.dll -c hth.json
A fatal error was encountered. The library 'libhostpolicy.so' required to execute the application was not found in '/home/user/miningcore/build/'.
Failed to run as a self-contained app. If this should be a framework-dependent app, add the /home/user/miningcore/build/Miningcore.runtimeconfig.json file specifying the appropriate framework.

It also does it on $PAC which worked before the crash.

