Error 499 Perspective

When I’m lauching any pages I have this :

Dont know why because it happend suddently without saving something on my project

The problem could be from session_custom ?

Are you using NGinx? Quick searches online suggest the 499 status code is NGinx-specific and a result of connections being closed before a server can respond.

I’m not using NGinx

By the way i could fix the problem by disabled my anti virus, but I think it’s not a good alternative

Do you have other ideas ?

It sounds like your antivirus is acting as a man in the middle on your own traffic (and probably using nginx internally).