The library 'libhostpolicy.so' required to execute the application was not found

dotnet core Newbie here, need help to find the right direction.

I’m trying to run the latest version of omnisharp-roslyn on Ubuntu 18.04 and .net core 3.0.0

Just trying to start it, I get the following error message:

$ dotnet ./OmniSharp.exe
A fatal error was encountered. The library 'libhostpolicy.so' required to execute the application was not found in '/opt/omnisharp-dist/omnisharp/'.
Failed to run as a self-contained app. If this should be a framework-dependent app, add the /opt/omnisharp-dist/omnisharp/OmniSharp.runtimeconfig.json file specifying the appropriate framework.

$ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.0.100
 Commit:    04339c3a26

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  18.04
 OS Platform: Linux
 RID:         ubuntu.18.04-x64
 Base Path:   /usr/share/dotnet/sdk/3.0.100/

Host (useful for support):
  Version: 3.0.0
  Commit:  95a0a61858

.NET Core SDKs installed:
  3.0.100 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.0.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.0.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

Any kind of suggestions appreciated, thanks!