HttpError: Resource not accessible by integration

Possible null reference argument for parameter 'source' in 'TList? Enumerable.SingleOrDefault<TList>(IEnumerable<TList> source, Func<TList, bool> predicate)'.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'source' in 'bool Enumerable.Any<LyricItem>(IEnumerable<LyricItem> source)'.

Possible null reference argument for parameter 'source' in 'IEnumerable<LyricItem> Enumerable.Where<LyricItem>(IEnumerable<LyricItem> source, Func<LyricItem, bool> predicate)'.

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

Dereference of a possibly null reference.

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.

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