diff --git a/core/core-frontend/src/views/common/DeResourceTree.vue b/core/core-frontend/src/views/common/DeResourceTree.vue
index 2a19d28b2d..a88b89be7a 100644
--- a/core/core-frontend/src/views/common/DeResourceTree.vue
+++ b/core/core-frontend/src/views/common/DeResourceTree.vue
@@ -644,7 +644,7 @@ const initOpenHandler = newWindow => {
       methodName: 'initOpenHandler',
       args: newWindow
     }
-    openHandler.value.invokeMethod(pm)
+    openHandler.value?.invokeMethod(pm)
   }
 }
 
diff --git a/core/core-frontend/src/views/data-visualization/PreviewHead.vue b/core/core-frontend/src/views/data-visualization/PreviewHead.vue
index 99aa934651..edfbee47a2 100644
--- a/core/core-frontend/src/views/data-visualization/PreviewHead.vue
+++ b/core/core-frontend/src/views/data-visualization/PreviewHead.vue
@@ -112,7 +112,7 @@ const initOpenHandler = newWindow => {
       methodName: 'initOpenHandler',
       args: newWindow
     }
-    openHandler.value.invokeMethod(pm)
+    openHandler.value?.invokeMethod(pm)
   }
 }
 </script>
diff --git a/core/core-frontend/src/views/template-market/index.vue b/core/core-frontend/src/views/template-market/index.vue
index 6f0b425df1..a39fab481a 100644
--- a/core/core-frontend/src/views/template-market/index.vue
+++ b/core/core-frontend/src/views/template-market/index.vue
@@ -539,7 +539,7 @@ const initOpenHandler = newWindow => {
       methodName: 'initOpenHandler',
       args: newWindow
     }
-    openHandler.value.invokeMethod(pm)
+    openHandler.value?.invokeMethod(pm)
   }
 }
 
diff --git a/core/core-frontend/src/views/workbranch/index.vue b/core/core-frontend/src/views/workbranch/index.vue
index ad3d2204af..ffb0255fe2 100644
--- a/core/core-frontend/src/views/workbranch/index.vue
+++ b/core/core-frontend/src/views/workbranch/index.vue
@@ -277,7 +277,7 @@ const initOpenHandler = newWindow => {
       methodName: 'initOpenHandler',
       args: newWindow
     }
-    openHandler.value.invokeMethod(pm)
+    openHandler.value?.invokeMethod(pm)
   }
 }