Hi,
I have been playing STK for about 5 years, on Ubuntu 14.04 OS. I downloaded it from the ubuntu repository, and its Supertuxkart Version SVN, which is probably an older version. I used to have no problems downloading and installing Addons inside the game, until last year. Now it doesn't work at all, and I just get an error message: "Sorry, an error occurred while trying to contact the Addons website".
I managed to download a track from the STK website at <https://online.supertuxkart.net/addons.php?type=tracks>, but I don't know how to install it this way. Can anyone here show me how to do it?