Go back to update 2.0.0 and delete your whole data folder for the plugin called Loadoutless_folder

[Error] Failed to call hook 'LoadoutCommand' on plugin 'Loadoutless v2.0.1' (ArgumentException: Could not cast or convert from System.String to Oxide.Plugins.Loadoutless+PlayerLoadout.)
  at Newtonsoft.Json.Utilities.ConvertUtils.EnsureTypeAssignable (System.Object value, System.Type initialType, System.Type targetType) [0x00062] in <2ae3f091decd4989b3c4d466e6eb5985>:0

  at Newtonsoft.Json.Utilities.ConvertUtils.ConvertOrCast (System.Object initialValue, System.Globalization.CultureInfo culture, System.Type targetType) [0x00031] in <2ae3f091decd4989b3c4d466e6eb5985>:0

  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x0008d] in <2ae3f091decd4989b3c4d466e6eb5985>: