Is there anyone who know what 'Refused to get unsafe header "X-Bandwidth-Est 3"' error means? : I have a problem with every website that I am working on currently. And the error is this:

Refused to get unsafe header "X-Bandwidth-Est 3" in base.js.
Base.js is youtube file. I searched a lot and I couldn't find this error. Anyone have idea what this error is?

[ And this is image of this error][1]


  [1]: https://i.stack.imgur.com/UPpzN.png