NewtonSoft Serialization Exception

Newtonsoft.Json.JsonSerializationException: Type specified in JSON 'System.Collections.Generic.List1[[RetrobineShared.DTOs.ItemDto, RetrobineShared, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' is not compatible with 'System.Collections.Generic.List1[[RetrobineShared.DTOs.ItemDto, RetrobineShared, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'. Path 'UserBoard.Items.$type', line 1, position 267.