Error on installation Prestashop in Plesk 12.5 in Linux

I'm trying to install prestashop from section Applications in plesk Constrol panel, in a domain but i get the following errors at the end of installation

Error: The following error has occurred during the installation of application:
Installation of Prestashop at http://<domain>/ failed.
invalid values passed for settings of application resource;
details for setting with id 'ADMINPASSWORD': Value must be at least 8 characters long.;
details for setting...

Error on installation Prestashop in Plesk 12.5 in Linux