Инициализатор типа для System.IdentityModel.Tokens.Jwt.JsonExtensions вызвал исключение

Question

Dim stream As FileStream = New FileStream("jsonFile.json", FileMode.Open)
Dim iconfig As IBoxConfig = BoxConfig.CreateFromJsonFile(stream)

Dim admintoken As String = boxJWT.AdminToken()
Dim adminClient As BoxClient = boxJWT.AdminClient(admintoken)

Dim boxJWT As BoxJWTAuth = New BoxJWTAuth(iconfig)
Dim userToken As String = boxJWT.UserToken(userId)
Dim userClient As BoxClient = boxJWT.UserClient(userToken, userId)

Код успешно выполнен в Visual Studio, но не выполнен в Blue Prism.Ошибка происходит здесь --Dim admintoken As String = boxJWT.AdminToken ()