diff --git a/htdocs/js/GraphTool/graphtool.js b/htdocs/js/GraphTool/graphtool.js
index 32b2735f79..3f3d4ffe7b 100644
--- a/htdocs/js/GraphTool/graphtool.js
+++ b/htdocs/js/GraphTool/graphtool.js
@@ -9,6 +9,7 @@ window.graphTool = (containerId, options) => {
 	const gt = {};
 
 	gt.graphContainer = document.getElementById(containerId);
+	if (!gt.graphContainer) return;
 	if (gt.graphContainer.offsetWidth === 0) {
 		setTimeout(() => window.graphTool(containerId, options), 100);
 		return;