diff --git a/frontend/src/components/group/GroupListBox.tsx b/frontend/src/components/group/GroupListBox.tsx
index 534b104..c3ca12f 100644
--- a/frontend/src/components/group/GroupListBox.tsx
+++ b/frontend/src/components/group/GroupListBox.tsx
@@ -21,7 +21,7 @@ export function GroupListBox({viewSet}: GroupListBoxProps): JSX.Element {
             if(viewSet.resources.length === 0) {
                 return <Empty>This Sophon instance has no groups.</Empty>
             }
-            return viewSet.resources?.map(res => <GroupResourcePanel resource={res} key={res.value?.slug}/>)
+            return viewSet.resources?.filter(res => res !== undefined).map(res => <GroupResourcePanel resource={res} key={res.value?.slug}/>)
         },
         [viewSet],
     )
diff --git a/frontend/src/components/notebook/NotebookListBox.tsx b/frontend/src/components/notebook/NotebookListBox.tsx
index 6487883..dd702b9 100644
--- a/frontend/src/components/notebook/NotebookListBox.tsx
+++ b/frontend/src/components/notebook/NotebookListBox.tsx
@@ -21,7 +21,7 @@ export function NotebookListBox({viewSet}: NotebookListBoxProps): JSX.Element {
             if(viewSet.resources.length === 0) {
                 return <Empty>This project has no notebooks.</Empty>
             }
-            return viewSet.resources?.map(res => <NotebookResourcePanel resource={res} key={res.value.slug}/>)
+            return viewSet.resources?.filter(res => res !== undefined).map(res => <NotebookResourcePanel resource={res} key={res.value.slug}/>)
         },
         [viewSet],
     )
diff --git a/frontend/src/components/project/ProjectListBox.tsx b/frontend/src/components/project/ProjectListBox.tsx
index 7e713a1..4e75f8d 100644
--- a/frontend/src/components/project/ProjectListBox.tsx
+++ b/frontend/src/components/project/ProjectListBox.tsx
@@ -21,7 +21,7 @@ export function ProjectListBox({viewSet}: ProjectListBoxProps): JSX.Element {
             if(viewSet.resources.length === 0) {
                 return <Empty>This group owns no projects.</Empty>
             }
-            return viewSet.resources?.map(res => <ProjectResourcePanel resource={res} key={res.value.slug}/>)
+            return viewSet.resources?.filter(res => res !== undefined).map(res => <ProjectResourcePanel resource={res} key={res.value.slug}/>)
         },
         [viewSet],
     )