Have you tried calling Dale? 😉
I don't know about this machine, or anything mechanical really, but sometimes a bobbin getting jammed can hold things up. Try taking it out (slide the metal plate forward) and making sure there's not knotted old thread under there.
Edit to add: some machines have a bobbin-winding setting where it doesn't move the needle, just spins thread onto a bobbin on the spindle. You "switch gears" into/out of that mode on my machine by pulling out or pushing in the big wheel on the right.
Editing again: looks like the owner's manual is available online. Would be useful in any case.