From 6ab462a79523705400c5a09be074fa0fd6166cc5 Mon Sep 17 00:00:00 2001
From: James Cole <james@firefly-iii.org>
Date: Sat, 28 Oct 2023 17:28:54 +0200
Subject: [PATCH] Fix issue in bill transformer.

---
 app/Transformers/BillTransformer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/Transformers/BillTransformer.php b/app/Transformers/BillTransformer.php
index b84222281f..b3c4f95681 100644
--- a/app/Transformers/BillTransformer.php
+++ b/app/Transformers/BillTransformer.php
@@ -86,7 +86,7 @@ class BillTransformer extends AbstractTransformer
         foreach ($payDates as $string) {
             $payDatesFormatted[] = Carbon::createFromFormat('!Y-m-d', $string, config('app.timezone'))->toAtomString();
         }
-        $nextExpectedMatch = null;
+        $nextExpectedMatch = '';
         if (null !== ($payDates[0] ?? null)) {
             $nextExpectedMatch = Carbon::createFromFormat('!Y-m-d', $payDates[0], config('app.timezone'))->toAtomString();
         }