Hi @Kiran Maruthi 

To resolve this error, you must approve the Restricted Caller Access (RCA) request that was automatically generated when your application tried to call the ScriptableDecisionTableAPI.getDecision API

• Navigate to RCA Privileges: In the filter navigator, go to System Applications > Application Restricted Caller Access.
• Locate the Request: Look for a record with the following details:
• Source Scope: Your <Custom App>.
• Target Scope: Qualys Core.
• Target Name: ScriptableDecisionTableAPI.getDecision.
• Status: Requested or Invalidated
• Approve Access: Open the record and change the Status to Allowed.
• Save the Record