Failed to execute 'send' on 'XMLHttpRequest'

Hello. I have implemented the script of BlipChat on my website - online shop.

But i have a problem: when i click on Blip Chat widget, it appears an error : “ Uncaught DOMException: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'https://jungheinrich.chat.blip.ai/static/settings.json'. “  and other errors by CORS policy. 

My project is made in prestashop 1.7 .  I added “Acces-Control” in htacces of project :

Header set Access-Control-Allow-Origin "*"
Header always set Access-Control-Allow-Headers "Content-Type, Authorization, Io-Format, Accept, X-Amz-Date, X-Api-Key, X-Amz-Security-Token"
      Header always set Access-Control-Allow-Methods "*"

 But nothing was resolved.

I want you to help me to work Blip Chat. Tell me what I should do BlipChat works.

Maybe i forgot to make something.

Thank you in advance