Stuck on the Approve Vehicle interface

Hi!
I create the interface as advised in the exercise, however, after I add the image component, the error message that displays does not disappear after I test the values. I type the following expression: : rule!AX_GetVehicleByID(1), I click Set as Default Test Values, then click Test Interface. After all this the error message is still there and prevents me from moving forward. Please advise!

Thank you

Rida 

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