+1
I suggest you update "suggest.glpi-project.org" certificate
The FAQ on https://glpi-project.org/faq/ refers to "suggest.glpi-project.org" which leads to the following certification warning before redirecting to glpi.userecho.com:
"This server could not prove that it is suggest.glpi-project.org; its security certificate expired 67 days ago."
Service d'assistance aux clients par UserEcho
Seems to have been fixed by now.