My azure student account is not able to access most of the services and resource groups like microsoft Entra Id and subscriptions, storage account etc. I'm getting the exact same error message, which is very frustrating.
You don't have access to this
Your sign-in was successful, but you don't have permission to access this resource.

I also publish my web app in visual studio 2019 to azure and I also get the error of unable to create the publish profile in my local computer when I sign in my azure student account into visual studio 2019.
I expect to take the exam Az 204 and can I be possible to sit in the range of azure student account free services.
According to this MS Q&A by JamesTran-MSFT:
Once I add the reader role to the user, they can view the resource.
Portal:
If you need to create or update, you need the
contributorrole. The Reader role is only to view the resources.