So I was using this addon on a clean version of an HL2: Ep2 map but that's not the point. The point is the title.

I tried to use Soundcloud Player to play something and I couldn't select most songs cause they failed to load I guess. And after a little while of using it the game crashed most likely due to too many errors.

Conclusion? Disable or just don't use Soundcloud Player if you plan on using this addon. It could also be that these two addons were conflicting with Media Player, but I highly doubt it. Not saying this is a bad addon, just be careful with what does and doesn't work.