please help, if i open my apps from real browser will return this

but if I open it from "try it out" return this

I only change index.html
/* url: "http://petstore.swagger.wordnik.com/api/api-docs", */
url: "http://localhost:8080/pena-im/api-docs",
Am I missing some configuration ?
by the way I'm just using dist folder, not building from source
Thanks in advance