Remote CSS Error undecidable.

Dear Mickey Kay
First of all thank you for this plugin. I really don’t know what to do with Remote CSS Error message in admin panel. I use your plugin on 2 sites, first is ok but on second one I see this message every day. Is there any way to hide this message? Maybe edit something in better-font-awesome-library.php file? I read all posts before and try change URL but nothing happen. Plugin work fine, but every time I see this error message in admin panel.

Please help ^_____^

“Remote CSS Error
The attempt to fetch the remote Font Awesome stylesheet failed with the following error: http_request_failed: A valid URL was not provided. (URL: ://cdn.jsdelivr.net/fontawesome/4.7.0/css/font-awesome.min.css)
The embedded fallback Font Awesome will be used instead (version: 4.7.0).

Don’t worry! Better Font Awesome will still render using the included fallback version: 4.7.0

Solution
This may be the result of a temporary server or connectivity issue which will resolve shortly. However if the problem persists please file a support ticket on the plugin forum, citing the errors listed above.”