Bobbin winder is in operation mode

check and make sure the bobbin winder has returned to it's normal position for when you sew

the bobbin winder could be loose or broken, may need to be replaced

there is a small lever like thing there move it away from the bobbin. it usually kicks back when the bobbin is full.

Until you can get your bobbin winder repaired, I'd suggest picking up a bobbin winder at your local fabric store. The last time I noticed, they cost about $30. Many sewists prefer to use this little accessory inside of wearing out the bobbin winder on their sewing machine. Also, if you more than one thread cone, you can rewind bobbins without unthreading your sewing machine.

truthfully I think their something wrong with the computer in the machine because
the bobbin locked up. sometimes when a sewing machine jams it can make
the machine jump time.
but the needle moved positions, some part of the machine is changed during the
jam up, even tho you reset it.
embroidery machine are expensive, my suggestion is to have the machine checked

If you try to wind the bobbin with the embroidery unit on, you need to send a design to the machine before trying to wind the bobbin. If the embroidery unit is off, you should wind the bobbins without any problems

What are you doing when this happens, embroidery or sewing? Also are you creating a nest, or does the bobbin not move freely?

Check to see that the bobbin is not over wound. The thread should not touch the sides of the bobbin case. This can happen if the bobbin adjustment, the white dial adjacent to the bobbin winder, has been turned and the bobbin winder kicks off too late.

To clarify, take the thread from the spool, through that little clip, loop it around the little metal button piece at the top (should have a diagram on top of the machine), then through one of the tiny holes in the upper side of a bobbin. Place the bobbin on the vertical bobbin winder pin/rod on top of the machine then be sure to snap that pin/rod all the way to the right to engage motor. Then try. Most of the time people forget to push the bobbin winder pin/rod to the right which leaves the machine in sewing mode rather than in bobbin winding mode. Easy mistake. ;)

In embroidery mode, you have to send a design to the machine before the bobbin winder will work.

You should always use proper Bobbin Thread for embroidery - not a bobbin wound from regular dressmaking thread. You are right, the special bobbin thread is thinner so that the embroidery thread will be pulled to the underside and you get a nice shiny embroidery on top with no bobbin showing through. Wind yourself 6 or more bobbins at a time of bobbin thread to always have some on hand, or buy the pre-wound L size ones.
All embroidery machines - no matter what brand - recommend using bobbin thread for embroidery. It is readily available at all sewing stores, probably even Spotlight would carry some. If you get stuck for a supply, try overlocker thread.