From dc937a0960840bdc62678ed52207ccb41dda6e47 Mon Sep 17 00:00:00 2001
From: Jessica McInchak <jessica.mcinchak@gmail.com>
Date: Mon, 2 Dec 2024 15:45:19 +0100
Subject: [PATCH] fix: `TypeError: R.startsWith is not a function` in
 `computePassport` (#4026)

---
 editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts b/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
index 3a86b50f7e..ef3a4f164c 100644
--- a/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
+++ b/editor.planx.uk/src/pages/FlowEditor/lib/store/preview.ts
@@ -226,7 +226,7 @@ export const previewStore: StateCreator<
               .concat(existingValue)
               .reduce(
                 (acc: string[], curr: string, _i: number, arr: string[]) => {
-                  if (!arr.some((x) => x !== curr && x.startsWith(curr))) {
+                  if (!arr.some((x) => x !== curr && x?.startsWith(curr))) {
                     acc.push(curr);
                   }
                   return acc;