Thank for your reply but i already tried adding that into my header of my pages with no success.
After futher examinations i found that what cause the error 500 is some JS that i use.
Sadly i've return to Xampp for my ongoing project for now. don't know what they've done but at least it's working.
On Xampp :
- Apache 2.4.25
- PHP 5.6.30
- Apache 2.4.34 VC11
- PHP 5.6.37 VC11
I even tried running on php 7.1.20 vc14 with apache 2.4.27 vc14 with no success.