I used OWASP ZAP software which enable you to test your website in attacking it , it finds security failures. So I did it to my Laravel Application 5.4 version and I have this error
To be honest I don't really understand what I have to do to fix that cookie laravel_session problem, if some one can help me, give me some advice, it could be nice :)
I found the solution, it's weird but when I disabled my debugbar in laravel, the errors disappeard in owasp zap software.