Fatal error: Uncaught PHPExcel_Exception: Invalid character found in sheet title in /homepages/25/d349456728/htdocs/SG-Essen/webs/sg-datacenter/prod/wordpress/WebBest/classes/PHPExcel/Worksheet.php:467 Stack trace: #0 /homepages/25/d349456728/htdocs/SG-Essen/webs/sg-datacenter/prod/wordpress/WebBest/classes/PHPExcel/Worksheet.php(841): PHPExcel_Worksheet::_checkSheetTitle('Masters ?geschl...') #1 /homepages/25/d349456728/htdocs/SG-Essen/webs/sg-datacenter/prod/wordpress/WebBest/Stammdaten/getBestenlisten.inc.php(38): PHPExcel_Worksheet->setTitle('Masters ?geschl...') #2 {main} thrown in /homepages/25/d349456728/htdocs/SG-Essen/webs/sg-datacenter/prod/wordpress/WebBest/classes/PHPExcel/Worksheet.php on line 467