I am on the mission exercise of system architect and on the step "US-2009: Display customer information to confirm authentication". I am getting an error on Data Transform Property Source syntax:
Invalid expression or reference: error: Declare-Page 'D_CustomerCredentialLookup' does not take parameter 'UserName'
The system does not allow me to save newly created property "SetCustomerKey" because of the source error.
All steps are performed correctly,a ccording to guidance and walkthrough.
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