appcache error

Hello,

I'm trying to cache and make my app working offline, (using vuejs and webpack offline plugin)

it works on google chrome.

i have this error on EB :

Application Cache update failed, because http://{myip}:4000/styles.f136d6a8.css could not be fetched. (it's css file here but it's totaly random, it could be a js or woff file)

i dont understand because when i click on the url, he show me the file content that i'm trying to fetch.

How can i resolve this problem please ?

Thanks