kind of desperate with this problem that I don't know how to fix and I don't know the cause. Full error when running Blazor app:

It's a WASM application hosted in .net core. Therefore there is a backend and a frontend. I have set my backend project as Startup project, which will take care of hosting also the frontend. Both projects are set up on .NET 5. I have read that multiple factors can cause this error and yet I tried all the possible solutions I have found so far.

• I kill manually the app processes that hang running even when I stop debugging, closed VS, deleted the whole .vs folder and then restarted VS.
• I disabled script debugging

• Also tried enabled and disabled:

• Tried also to start it with latest version of Microsoft Edge instead of Chrome, sometimes it works and doesn't give troubles sometimes it doesn't
• in a post I have read from the official support that it's a bug that is being solved already in the 16.10 VS preview version. I downloaded and installed it, still nothing.
• tried both iisExpress and .net CLI as hosting profile.

Moreover when starting the app a normal blank page only opens on the browser:

Don't know honestly what to try anymore. Could anyone help? Thanks in advance!