I have moved from Centos Linux to Rocky Linux and could not play Perron FM on onlineradiobox.com whereas I could on an Ubuntu Linux machine. It turned out I had to install ffmpeg (dnf ffmpeg) on the OS to support the right codec. The error was (in Firefox developer view, F12): HTTP “Content-Type” of “audio/aac” is not supported. Load of media resource https://onlineradiobox.com/json/za/perronfm/play?platform=web failed. Hope this helps someone.