diff --git a/webgis/js/components/utils.js b/webgis/js/components/utils.js
index 6ec9d60..c3ab717 100644
--- a/webgis/js/components/utils.js
+++ b/webgis/js/components/utils.js
@@ -151,7 +151,10 @@ Utils.buildBibliography = async function(recordUri, recordId) {
  * to Stimulus links
  */
 Utils.parseMarkers = function(text) {
-    const regex = /(?<marker>\[marker coords=\"(?<coords>[\d\s\.]+)\"\ ?(group=\"(?<group>\w+)\")?](?<content>[\w\s\.;:\-]+)\[\/marker\])/mig;
+    const regex = /(?<marker>\[marker coords=\"(?<coords>[\d\s\.]+)\"\ ?(group=\"(?<group>\w+)\")?](?<content>[\w\s\.;:\-\"\']+)\[\/marker\])/mig;
+    
+    if (!text) return text;
+
     let matches = [...text.matchAll(regex)];
 
     if (matches.length) {