Erro ao Conectar com o banco de dados!

PDOException: SQLSTATE[08004] [1040] Too many connections in /home1/dese4804/imoveismiriamribeiro.saasps.com/sistema/conexao.php:20 Stack trace: #0 /home1/dese4804/imoveismiriamribeiro.saasps.com/sistema/conexao.php(20): PDO->__construct('mysql:dbname=de...', 'dese4804_miriam...', Object(SensitiveParameterValue)) #1 /home1/dese4804/imoveismiriamribeiro.saasps.com/cabecalho.php(2): require_once('/home1/dese4804...') #2 /home1/dese4804/imoveismiriamribeiro.saasps.com/index.php(3): require_once('/home1/dese4804...') #3 {main}