Projectplaylist problem with code

[PattyG62]

I uploaded a song from windows media player and I got the URL. I copy and pasted it to projectplaylist, but it gave me an error message...why is this?

[Puniksem]

The name may have illegal characters in the title:

example: your%20song.mp3 (wrong) and your_song.mp3 (right)

A space character shown as %20 in the filename, some players don't get on with this character formatting.