Fatal error: Uncaught TypeError: selectTransactionById(): Return value must be of type array|string, null returned in /home/lugeye/hotel.lugeye.co.tz/functions/transaction_functions.php:127 Stack trace: #0 /home/lugeye/hotel.lugeye.co.tz/views/voucher/transaction_pdf.php(5): selectTransactionById() #1 /home/lugeye/hotel.lugeye.co.tz/index.php(3470): include('/home/lugeye/ho...') #2 {main} thrown in /home/lugeye/hotel.lugeye.co.tz/functions/transaction_functions.php on line 127