I just purchased Bart Simpson & a Ninjago character, but when I place the vehicle disc on the center circle, I get a message that pops up telling me that it is an empty disc.
I thought to build the vehicles (the 1st time not upgrades) all you had to do was
1) place the disc on the center circle
2) on screen build instructions would appear
3) Save the vehicle to the disc
Why is this not working for these two characters? If it matters, I am attempting to do this outside of any of the worlds. Directly outside of the "vortex" that you jump through to begin a level.