diff --git a/src/designer/elsa-workflows-studio/src/components/controls/elsa-monaco/elsa-monaco.tsx b/src/designer/elsa-workflows-studio/src/components/controls/elsa-monaco/elsa-monaco.tsx
index aeab067fe..abec6a67e 100644
--- a/src/designer/elsa-workflows-studio/src/components/controls/elsa-monaco/elsa-monaco.tsx
+++ b/src/designer/elsa-workflows-studio/src/components/controls/elsa-monaco/elsa-monaco.tsx
@@ -162,7 +162,10 @@ export class ElsaMonaco {
   }
 
   disconnectedCallback() {
-    this.editor.dispose();
+    const editor = this.editor;
+
+    if (!!editor)
+      editor.dispose();
   }
 
   registerLiquid() {