I received a message on my project that it was using windows- legacy compatibility and that I needed to convert it to windows. Upon converting it to windows I am receiving the following error:
NU1202: Package NSG_DPI 1.0.32 is not compatible with net6.0-windows7.0 (.NETCoreApp,Version=v6.0). Package NSG_DPI 1.0.32 supports: net45 (.NETFramework,Version=v4.5)
It seems that your custom nupkg package was not migrated to .Net6.0 Framework, or it was migrated, but you missed adding the actual path of your package source.