diff --git a/src/lib/stores/schedules.ts b/src/lib/stores/schedules.ts
index 6fa0a1b5f..9645dfd17 100644
--- a/src/lib/stores/schedules.ts
+++ b/src/lib/stores/schedules.ts
@@ -207,13 +207,18 @@ export const submitEditSchedule = async (
 
   const fields = body.schedule.action.startWorkflow?.header?.fields;
   if (fields && Object.keys(fields).length > 0) {
-    const entries = Object.entries(fields);
-    for (const [key, value] of entries) {
-      const encodedValue = await encodePayloads(
-        stringifyWithBigInt(value),
-        'json/plain',
-      );
-      fields[key] = encodedValue[0];
+    try {
+      const entries = Object.entries(fields);
+      for (const [key, value] of entries) {
+        const encodedValue = await encodePayloads(
+          stringifyWithBigInt(value),
+          'json/plain',
+        );
+        fields[key] = encodedValue[0];
+      }
+    } catch (e) {
+      error.set(`${translate('data-encoder.encode-error')}: ${e?.message}`);
+      return;
     }
   }