Could someone please help me in resolving the above issue. According to the error description it is clear that Key is not getting passed to the Interaction Manager. Hence the Error message is displayed.
Could someone can please help me where exactly we need to check the Account Number Property as a Key to Interaction Manager while debugging.
Please let me know where exactly we can see the Key value during Debug, So that it is easy to understand. Please find the below screenshot for reference.
I would place a breakpoint right after your WaitForCreate step and step through each step after that. From your screenshot, everything look OK. When you hover your pointer over the blue dots, you can see the values being passed. Check to see that you are getting an account number.