I'm getting an error message:
Unable to find package Microsoft.AspNetCore.SignalR with version (>= 1.0.0-preview1-27891)
- Found 3 version(s) in nuget.org [ Nearest version: 1.0.0-alpha2-final ]
- Found 0 version(s) in Microsoft Visual Studio Offline Packages MaiPiuSprechi.Web.Core C:\PROGETTI\MaiPiuSprechi\3.4.1\aspnet-core\src\MaiPiuSprechi.Web.Core\MaiPiuSprechi.Web.Core.csproj
Framework: ABP + .NET Core (version 3.4.1)