ISP Protect : you cannot connect to our license server

Hi,
I haven't found any other place to post about this ...
I bought a 5 scan of ISP Protect.
After entering licence key and directory to scan, I get :

Thanks for your help.

 

Have you done what the error message tells you to do?

 

There is no problem at all with PHP accessing any page outside.

PHP:

<?php
#$page = file_get_contents('https://mausapi.ispconfig.org/');
$page = file_get_contents('https://gmail.com/');
echo $page;

It is https://mausapi.ispconfig.org that fails with a 504 Gateway Time-out.
You can try from your browser to test.

 

Thanks till !
It runs now.