diff --git a/src/renderer/src/runtime/sync-runtime-graph.ts b/src/renderer/src/runtime/sync-runtime-graph.ts
index e735e130004..fb32a847941 100644
--- a/src/renderer/src/runtime/sync-runtime-graph.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph.ts
@@ -1496,7 +1496,7 @@ function buildMobileBrowserTab(
     // back through ?? would resurrect a stale workspace-level error.
     loadError: activePage ? activePage.loadError : workspace.loadError,
     certificateFailure: activePage
-      ? (state.browserCertificateFailuresByPageId[activePage.id] ?? null)
+      ? (state.browserCertificateFailuresByPageId?.[activePage.id] ?? null)
       : null,
     color: unifiedTab?.color ?? null,
     isPinned: unifiedTab?.isPinned === true,