TypeLoadException Error - NewtonsoftJsonSerializer


I’m using SpeckleCore 2.14.2 (nuget) and calling the GetUserInfo method which is returning the following error:

TypeLoadException: Method ‘DeserializeToWebsocketResponse’ in type ‘Speckle.Core.Api.GraphQL.Serializer.NewtonsoftJsonSerializer’ from assembly ‘SpeckleCore2, Version=, Culture=neutral, PublicKeyToken=null’ does not have an implementation.

I did a search on github issues but don’t see anyone else encountering this issue, and looking at the source code there does seem to be an implementation for this method - anyone able to shed some light on this?


Hey Dan,

Can you show a bit your code? Are you running this in a standalone app or inside a host application?

Hey @teocomi - it’s being run in a standalone app (ASP.NET). The method is being called in the middleware for the auth flow after fetching a token.

Here’s a snippet from the method:

using var tokens = await ExchangeCodeAsync(codeExchangeContext);

if (tokens.Error != null)
  return HandleRequestResult.Fail(tokens.Error);

if (string.IsNullOrEmpty(tokens.AccessToken))
  return HandleRequestResult.Fail("Failed to retrieve access token.");

var identity = new ClaimsIdentity(ClaimsIssuer);

var user = Speckle.Core.Credentials.AccountManager.GetUserInfo(tokens.AccessToken, "https://speckle.xyz");

var ticket = await CreateTicketAsync(identity, new AuthenticationProperties(), tokens);

if (ticket != null)
  return HandleRequestResult.Success(ticket);
  return HandleRequestResult.Fail("Failed to retrieve user information from remote server.");