The example CRON command from Blesta admin interface "Settings/Systems/Automation" & button,
*/5 * * * * /usr/bin/php /my-user-path/public_html/index.php cron
was working fine when we clicked the Blesta button, but at his cPanel the command was certainly wrong, as it's had to be close to above but different in the display:
, I removed */5 * * * * in front of command as cPanel have his own interface for create this part (but cpanel do not display it in that way) and not only that, certainly previous command set at cPanel had not same php path, but as above full command work manually from Blesta, I just taken the same way and without searching to adapt PHP path or precise a given user.
And that's it