Fatal error: Uncaught TypeError: sqlsrv_begin_transaction(): Argument #1 ($conn) must be of type resource, false given in C:\wamp64\www\React_mob_Dev\CAFMS\8.4\authenticate_login.php:11 Stack trace: #0 C:\wamp64\www\React_mob_Dev\CAFMS\8.4\authenticate_login.php(11): sqlsrv_begin_transaction(false) #1 {main} thrown in C:\wamp64\www\React_mob_Dev\CAFMS\8.4\authenticate_login.php on line 11