diff --git a/src/load_data.ts b/src/load_data.ts
index ddc0461..6a4f1cc 100644
--- a/src/load_data.ts
+++ b/src/load_data.ts
@@ -36,9 +36,13 @@ export async function loadFromUrl(
   url: string,
   handleCors: boolean,
 ): Promise<TopolaData> {
-  const cachedData = sessionStorage.getItem(url);
-  if (cachedData) {
-    return JSON.parse(cachedData);
+  try {
+    const cachedData = sessionStorage.getItem(url);
+    if (cachedData) {
+      return JSON.parse(cachedData);
+    }
+  } catch (e) {
+    console.warn('Failed to load data from session storage: ' + e);
   }
   const urlToFetch = handleCors
     ? 'https://cors-anywhere.herokuapp.com/' + url
@@ -58,9 +62,13 @@ export async function loadGedcom(
   gedcom?: string,
   images?: Map<string, string>,
 ): Promise<TopolaData> {
-  const cachedData = sessionStorage.getItem(hash);
-  if (cachedData) {
-    return JSON.parse(cachedData);
+  try {
+    const cachedData = sessionStorage.getItem(hash);
+    if (cachedData) {
+      return JSON.parse(cachedData);
+    }
+  } catch (e) {
+    console.warn('Failed to load data from session storage: ' + e);
   }
   if (!gedcom) {
     throw new Error('Error loading data. Please upload your file again.');