Just thought I would help. Many of you are somehow confused why we can't download your tracks, there are a simple reason for that.
When you upload a track to GTPlanet, there's only one URL that works.
It doesn't let us download your track if the link is the link to your PSN page, get it.
The correct link when upload a track has to be types as this, "always".
https://www.gran-turismo.com/us/gt6/user/#!/friend/nullerkatten69/course/2107434/
Replace nullerkatten69, with your own PSN ID, and replace the number 2107434/, with your tracks number.
In your psn page, and in your shared tracks, every individual track has there own number.
Click on every individual track, scroll down, and then click on the address above to see the number, then type in down to remember it. There are also a tread for this.