What this error means?

Hi,

 

I just started to learn how to create SharePoint framework extensions and I followed the official Microsoft guide. 

Evrything has worked fine until I reach the steps to host the extension in a CDN. There I have created the library and folder inside my communication site. But when i load the page, after deploying, I don't see any change in the page and looking the console I get this error:

 

HTTP406: NONE ACCEPTABLE - No responses acceptable to the client were found. GET - https://publiccdn.sharepointonline.com/americospdev.sharepoint.com/sites/ModernTeamSite/CDN/appExtension/app-extension-appextensionapplicationcustomizerstrings_en-us_c1939fe0e2c8ca2ca1f0b88db479a90f.js

What this error means? 

 

Best regards,

Americo