BSoD/Character Animation/Lower body armature


I’ve just started learning Blender. Going great with the tutorial regardless that the versions don’t line up. This has given me some troubles along the way. Working on this tutorial:

But now I’m really stuck. Done everything the way it told me but… the button IK Solver is gone. This became Spline IK. But when I add this constraint I can’t add armature to the Spline IK. What am I doing wrong?

Hope there is someone with some time left to help me. If it would help, my file is here:

Best regards, SlwR

Fixed the problem by using the short-cut key (shift+i).