I downloaded the Bootstrap 4 audio player on https://www.jqueryscript.net/other/Bootstrap-Audio-Player-Playlist-jQuery.html and unzipped it to a folder. I want to make some changes to this player, so I opened this folder as a project in Pinegrow. Somehow I don’t get to see the icons for ‘play / pause’ and ‘next’ , but only the textcode. And that doesn’t change when I open the ‘Preview page in browser’ (localhost) within Pinegrow. But when I open the same html-file directly in the same browser (Firefox), then it shows the icons correctly. I’m confused.