`ChaumianCoinJoinController`: Suppress warnings.
MODIFY
WalletWasabi.Backend/Controllers/ChaumianCoinJoinController.cs
WalletWasabi.Backend/Controllers/ChaumianCoinJoinController.cs
+#pragma warning disable CS8625 // Cannot convert null literal to non-nullable reference type.
+#pragma warning disable CS8619 // Nullability of reference types in value doesn't match target type.
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Caching.Memory;
@@ -809,3 +811,5 @@ public class ChaumianCoinJoinController : ControllerBase
/// </summary>
private ContentResult Gone(string content) => new() { StatusCode = (int)HttpStatusCode.Gone, ContentType = "application/json; charset=utf-8", Content = $"\"{content}\"" };
}
+#pragma warning restore CS8619 // Nullability of reference types in value doesn't match target type.
+#pragma warning restore CS8625 // Cannot convert null literal to non-nullable reference type.

`ChaumianCoinJoinController`: Suppress warnings.