Use PackageReference instead of ProjectReference.

IdentityServervNextDemo/aspnet-core/src/IdentityServervNextDemo.Web.Core/IdentityServervNextDemo.Web.Core.csproj

@@ -25,7 +25,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="3.1.4" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="5.4.1" />
     <PackageReference Include="Abp.AspNetCore" Version="5.13.0" />
-    <ProjectReference Include="D:\Github\volo\aspnetboilerplate\src\Abp.ZeroCore\Abp.ZeroCore.csproj" />
+    <PackageReference Include="Abp.ZeroCore" Version="5.13.0" />
     <PackageReference Include="Abp.AspNetCore.SignalR" Version="5.13.0" />
   </ItemGroup>
 </Project>