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Notice: Error al abrir base de datos in /home/sliafs/public_html/sistemas/connection/conex.php on line 9

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, bool given in /home/sliafs/public_html/sistemas/connection/conex.php:10 Stack trace: #0 /home/sliafs/public_html/sistemas/connection/conex.php(10): mysqli_query(false, 'SET NAMES 'utf8...') #1 /home/sliafs/public_html/sistemas/resumenes/perfil/recuperar_datos.php(8): require_once('/home/sliafs/pu...') #2 {main} thrown in /home/sliafs/public_html/sistemas/connection/conex.php on line 10