I have upgrade my solution from 8 to 9. In 8 everythings works fine.
But when upgraded to 9 i get the following error:
[![blazor.webassembly.js:1
ManagedError: One or more errors occurred. (Could not load file or assembly 'Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' or one of its dependencies.)][1]][1]
