https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/246756300/4523281307928803506/
https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/246756300/361798516966082260/

https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/246756300/368542844488661960/
https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/246756300/3184614758389968310/

You can help you self by reading these. Use the ingame help on the error pages.
Use the ingame help. Do not use HTML pages, use MP3/wav files and streams. No videos.
Basic computer and GMod knowledge required. No spoonfeeding support.

The only way I can suggest you and anyone to have an easier time to stream specific musics without any cost. Find a music(s) you want, convert them from Youtube to MP3 or WAV and crate a dropbox account, make a drop box folder that sharable (by link) than you get a sharable link of the music file into your Radio URL, should work without a problem, it's easy and fast.