diff --git a/src/public/app/services/utils.ts b/src/public/app/services/utils.ts
index 53fd85a7b..ee76093bb 100644
--- a/src/public/app/services/utils.ts
+++ b/src/public/app/services/utils.ts
@@ -411,7 +411,11 @@ async function openInAppHelp($button: JQuery<HTMLElement>) {
     if (inAppHelpPage) {
         // Dynamic import to avoid import issues in tests.
         const appContext = (await import("../components/app_context.js")).default;
-        const subContexts = appContext.tabManager.getActiveContext().getSubContexts();
+        const activeContext = appContext.tabManager.getActiveContext();
+        if (!activeContext) {
+            return;
+        }
+        const subContexts = activeContext.getSubContexts();
         const targetNote = `_help_${inAppHelpPage}`;
         const helpSubcontext = subContexts.find((s) => s.viewScope?.viewMode === "contextual-help");
         const viewScope: ViewScope = {
diff --git a/src/public/app/widgets/dialogs/recent_changes.ts b/src/public/app/widgets/dialogs/recent_changes.ts
index 9961817b1..dbaca5268 100644
--- a/src/public/app/widgets/dialogs/recent_changes.ts
+++ b/src/public/app/widgets/dialogs/recent_changes.ts
@@ -115,7 +115,10 @@ export default class RecentChangesDialog extends BasicWidget {
 
                                     await ws.waitForMaxKnownEntityChangeId();
 
-                                    appContext.tabManager.getActiveContext().setNote(change.noteId);
+                                    const activeContext = appContext.tabManager.getActiveContext();
+                                    if (activeContext) {
+                                        activeContext.setNote(change.noteId);
+                                    }
                                 }
                             });
 
@@ -141,7 +144,10 @@ export default class RecentChangesDialog extends BasicWidget {
                             // Skip clicks on the link or deleted notes
                             if (e.target?.nodeName !== "A" && !change.current_isDeleted) {
                                 // Open the current note
-                                appContext.tabManager.getActiveContext().setNote(change.noteId);
+                                const activeContext = appContext.tabManager.getActiveContext();
+                                if (activeContext) {
+                                    activeContext.setNote(change.noteId);
+                                }
                             }
                         })
                         .toggleClass("deleted-note", !!change.current_isDeleted)
diff --git a/src/public/app/widgets/quick_search.ts b/src/public/app/widgets/quick_search.ts
index 90ed9325e..f38d5e742 100644
--- a/src/public/app/widgets/quick_search.ts
+++ b/src/public/app/widgets/quick_search.ts
@@ -140,13 +140,19 @@ export default class QuickSearchWidget extends BasicWidget {
 
                 if (!e.target || e.target.nodeName !== "A") {
                     // click on the link is handled by link handling, but we want the whole item clickable
-                    appContext.tabManager.getActiveContext().setNote(note.noteId);
+                    const activeContext = appContext.tabManager.getActiveContext();
+                    if (activeContext) {
+                        activeContext.setNote(note.noteId);
+                    }
                 }
             });
             shortcutService.bindElShortcut($link, "return", () => {
                 this.dropdown.hide();
 
-                appContext.tabManager.getActiveContext().setNote(note.noteId);
+                const activeContext = appContext.tabManager.getActiveContext();
+                if (activeContext) {
+                    activeContext.setNote(note.noteId);
+                }
             });
 
             this.$dropdownMenu.append($link);
diff --git a/src/public/app/widgets/tab_row.ts b/src/public/app/widgets/tab_row.ts
index 68557df3a..0f60a9c2e 100644
--- a/src/public/app/widgets/tab_row.ts
+++ b/src/public/app/widgets/tab_row.ts
@@ -419,13 +419,13 @@ export default class TabRowWidget extends BasicWidget {
     closeActiveTabCommand({ $el }: CommandListenerData<"closeActiveTab">) {
         const ntxId = $el.closest(".note-tab").attr("data-ntx-id");
 
-        appContext.tabManager.removeNoteContext(ntxId);
+        appContext.tabManager.removeNoteContext(ntxId ?? null);
     }
 
     setTabCloseEvent($tab: JQuery<HTMLElement>) {
         $tab.on("mousedown", (e) => {
             if (e.which === 2) {
-                appContext.tabManager.removeNoteContext($tab.attr("data-ntx-id"));
+                appContext.tabManager.removeNoteContext($tab.attr("data-ntx-id") ?? null);
 
                 return true; // event has been handled
             }
diff --git a/src/public/app/widgets/type_widgets/empty.ts b/src/public/app/widgets/type_widgets/empty.ts
index 8338f53ae..e2a79e0c4 100644
--- a/src/public/app/widgets/type_widgets/empty.ts
+++ b/src/public/app/widgets/type_widgets/empty.ts
@@ -87,7 +87,10 @@ export default class EmptyTypeWidget extends TypeWidget {
                     return false;
                 }
 
-                appContext.tabManager.getActiveContext().setNote(suggestion.notePath);
+                const activeContext = appContext.tabManager.getActiveContext();
+                if (activeContext) {
+                    activeContext.setNote(suggestion.notePath);
+                }
             });
 
         this.$workspaceNotes = this.$widget.find(".workspace-notes");