The issue is likely caused by incorrect middleware order in Startup.cs. Try the following modification:

app.UseHttpsRedirection();
app.UseRouting();
app.UseCors("AllowAll");
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
});

You can also refer to this document:

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-3.1#middleware-order-2