Problema de Instalacion

ejecuto: php bin/console sylius:install

y no instala al final me sale esto:

Currency (press enter to use USD):
Adding US Dollar currency.
Language (press enter to use en_US):
Adding English Language.
Adding en_US locale.
Create your administrator account.
E-mail: yjmdcr@hotmail.com
Username (press enter to use email):
Choose password: Warning: exec() has been disabled for security reasons
Choose password: Warning: exec() has been disabled for security reasons
Choose password:
In Terminal.php line 69:

Warning: exec() has been disabled for security reasons

sylius:install:setup [-h|–help] [-q|–quiet] [-v|vv|vvv|–verbose] [-V|–version] [–ansi] [–no-ansi] [-n|–no-interaction] [-e|–env ENV] [–no-debug] [–]