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Policy validation failures - Dynamic Image Transformation for Amazon CloudFront

Policy validation failures

Symptoms: - 400 Bad Request errors when creating policies - Policy creation fails in Admin UI - "Invalid policy JSON" error messages

Solutions:

Check JSON syntax:

  • Validate JSON structure using online JSON validators

  • Ensure all required fields are present

  • Verify transformation parameter types match schema requirements

Review transformation limits: - Policy size limit: 400KB - Ensure transformation values are within valid ranges