Hi to all of you! 
From the version 1.15, SimpleSAMLphp allows to use Twig (https://twig.symfony.com/) templates to display web pages to users.
https://simplesamlphp.org/docs/stable/simplesamlphp-theming.html
Did someone create the twig template for SSP PrivacyIDEA plugin already?
Thank you so much for all!
Marco