Fix undefine PHP constant error when active Divi theme #898

Author: girishpanchal30

classes/Visualizer/Module/Chart.php

@@ -490,6 +490,9 @@ private function deleteOldCharts() {
 	 */
 	public function renderChartPages() {
 		defined( 'IFRAME_REQUEST' ) || define( 'IFRAME_REQUEST', 1 );
+		if ( ! defined( 'ET_BUILDER_PRODUCT_VERSION' ) && function_exists( 'et_get_theme_version' ) ) {
+			define( 'ET_BUILDER_PRODUCT_VERSION', et_get_theme_version() );
+		}
 		// Set current screen for the render chart.
 		set_current_screen( 'visualizer_render_chart' );
 		// check chart, if chart not exists, will create new one and redirects to the same page with proper chart id