[SOLVED] Help for the tutorial GC Sales & Redemption

Inner Exception 3
Type: System.NullReferenceException
Message: Object reference not set to an instance of an object.
Source: Samba.Services
Stack Trace: at Samba.Services.Implementations.AccountModule.AccountService.CreateTransactionDocument(Account selectedAccount, AccountTransactionDocumentType documentType, String description, Decimal amount, IEnumerable1 accounts)

There is something wrong with the Rule that fires the Create Account Transaction Document Action.

Please look at this Tutorial…