Enabling VisualForce page access for Surveys
- Navigate to Setup and search for Sites.
- Select the Site Label for Survey site you created in Step 1.
- Scroll to the Site Visualforce Pages section.
- Select the Edit button.
- From the Available Visualforce Pages list, Add the following pages to the Enabled Visualforce Pages list:
- SurveyResponder
- SurveyResponsesSummary
- Save your changes.