Found markup element with unexpected name 'Authorized'. If this is intended to be a component, add a @using directive for its namespace.

The using directive for 'Microsoft.AspNetCore.Components.Authorization' appeared previously in this namespace

The using directive for 'Microsoft.AspNetCore.Authorization' appeared previously in this namespace

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Non-nullable field 'OnThemeChanged' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Dereference of a possibly null reference.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'id' in 'Task<Account> AccountManager.GetAccount(string id)'.