From 8f73669d6a4d79c62646750360306f88a77f06db Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Mon, 22 Nov 2021 08:41:01 +0100
Subject: [PATCH] fix PHP 8.0 TypeError: Unsupported operand types: string +
 string

---
 importexport/inc/class.importexport_schedule_ui.inc.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/importexport/inc/class.importexport_schedule_ui.inc.php b/importexport/inc/class.importexport_schedule_ui.inc.php
index 0d54467221..de6140cad2 100644
--- a/importexport/inc/class.importexport_schedule_ui.inc.php
+++ b/importexport/inc/class.importexport_schedule_ui.inc.php
@@ -542,7 +542,7 @@ class importexport_schedule_ui
 				foreach($po->get_warnings() as $record => $msg)
 				{
 					$data['warnings'][$target][] = "#$record: $msg";
-					$buffer += "$record\t$msg\n";
+					$buffer .= "$record\t$msg\n";
 				}
 				error_log($buffer);
 			}
@@ -552,7 +552,7 @@ class importexport_schedule_ui
 				foreach($po->get_errors() as $record => $error)
 				{
 					$data['errors'][$target][] = "#$record: $error";
-					$buffer += "$record\t$error\n";
+					$buffer .= "$record\t$error\n";
 				}
 				error_log($buffer);
 			}