SSL certificate does not work on my prestashop

[pmontez]

Hello,

I bought a SSL Web Server Wildcard certificate, which I associated with the subdomains of my domain name "montez.fr". (So I associated the ssl with "* .montez.fr" during the setup of the SSL certificate).

The certificate is correctly issued because I created a "test" subdomain to see if the https is working, and it works fine as you can see here:

https://testtest.montez.fr/

However, it does not work on my prestashop:https://boutique.montez.fr/, I am directly redirected on http://boutique.montez.fr/index.php.

I tried to set it up in Prestashop :

In the setting of the shop > SEO & URL, store domain = boutique.montez.fr and SSL domain = boutique.montez.fr

In Store Settings> General Settings, I have the "Enable SSL Across the Entire Site" box greyed out. Nothing happen when I click on "Enable SSL". And when I click on the link "Please click here to check that your shop supports the HTTPS protocol", I am sent on an HTTPS page that comes back in HTTP a few seconds later and the mention "Not secured" on the left of the tab .

It's quite strange since the other sub domains I created all work correctly with the https (https://testtest.montez.fr/) except my prestashop store ...

I did reinstall an older version of Prestashop to try: it is not working...

Does anyone has an idea?

Thank you

 

PrestaShop Version: 1.7.3.0

Shop URL: http://boutique.montez.fr/

Active theme: classic

Information about your Linux server # 1 SMP Fri Nov 4 14:17:01 CET 2016 x86_64

Server software version: Apache

PHP Version: 5.6.24-0 + deb8u1

Memory limit: 140M

Maximum execution time: 60

Max size for sending files: 16M