How to fix 'Object reference not set to an instance of an object'?

[NagarjunaAtukur]

Hello, When I'm trying to make a http request using Utility - HTTP VBO, getting exception error message like "Internal : Could not execute code stage because exception thrown by code stage: Object reference not set to an instance of an object."  I heard "Object reference not set to an instance of an object" means object is passing null value to code stage. If yes, how to know which parameter/data item value is null. I cross checked each item, but no luck. Can anyone help me how to fix this error. PS: for better understanding error screenshot is attached.

[AmiBarrett]

Troubleshooting a code stage in Blue Prism is tricky, since it doesn't provide an actual IDE. You can temporarily make a copy of the code stage that does nothing more than output all of the input variables. You should also be able to step into the action with the code stage and see what values get populated at run time after it passes 'Start'.