if the paper you have has not printed with the targets/registration marks on it, the machine will not be able to find where it needs to cut.
you might be able to reprint it and get everything to line up but I would look up how to do the hinge method of print & cut and do that instead.
OK so you waste a sheet of paper - but that can be any old cheap paper. at least it should save the t-shirt one.
other then that, good ole scissors are the next best option - or a craft knife - depends on your skill level
Gaz

Cutters: Phoenix Silver Bullet 18", Black Cat Cougar 18", Silhouette Cameo & Cameo 4
Software: SCAL 5 Pro, Inkscape, Gimp
Computer:IMac running Mojave