Notice: Trying to get property 'num' of non-object in C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\DAOListarSeguimento.php on line 18

Notice: Trying to get property 'user' of non-object in C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\DAOListarSeguimento.php on line 19
erro: PDOException: SQLSTATE[HY105]: Invalid parameter type: -999 Parameter requires non-null value in C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\Dao.php:91 Stack trace: #0 C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\Dao.php(91): PDOStatement->execute() #1 C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\BOUtilizadorPainel.php(1045): Dao->execute() #2 C:\xampp\htdocs\Q4Evolution\SrwWebSite\database\painel\DAOListarSeguimento.php(20): BOUtilizadorPainel->ListarSeguimento() #3 {main}