I just rewound my bobbin and it will not come off the holder, what do I do?

Question edited for clarity. It is a 'bobbin', not a 'bobbing'.
Is it E6, E7, E4, or is it E674? But the main problem, NO Make and Model. Just Google the Error code like this with make and model before it Margaret.

https://www.google.com/search?q=E674

...

Did you check to be sure you placed the bobbin back in the holder correctly? I think it might snap in. Also, is the bobbin holder clipped back in? Lastly, do you have the bobbin going in the correct direction when the thread comes out? Some go in clockwise and some counter-clockwise.

make sure the thread on the bobbin rolls away from you when you put it in the bobbin holder. insure that the bobbin and bobbin casing are installed correctly.

mike (really by my wife Sandy)

Is there thread stuck on the spindle? If the bobbin is inserted the wrong way, sometimes thread can get stuck on the spindle. Another reason could be that the thread is not pulled all the way through the bobbin holder or it's caught between parts on the holder.

Bobbins are wound at the top of your machine. There is a post on the top right that your empty bobbin is slid onto, a chrome latch that pushes towards the bobbin. A spool of thread is set into another post, usually right behind the little bobbin winder post. A length of thread is guided thru a post at the opposite end and brought back to the bobbin-winder post. Nowthe power is engaged. At the time of power applied, the post upon which the bobbin is seated on, spins and accumulates the thread. Note: Bobbins must be removed from underneath the sewing stage to be rewound with new thread. Replacement is much the same as removal, with a plate that slides away, a reveals the shuttle where the bobbin is located. The rewinding happens at the top.

check to make sure the top thread isn't coming off the thread take up lever
also make sure the bobbin is turned the right way in the bobbin case
make sure the needle is turned the correct way in the needle holder
also try a different bobbin
if none of these suggestions help, then it would be a good idea to have the machine checked for a timing problem

you might have to use some force but not enough to break
the bobbin winder spindle. it's also possible that there is something
wrong with the bobbin for it to get stuck on the bobbin winder spindle
like that.

it needs to be taken to a repair shop to be readjusted

With power off, take the needle out and the presser foot. Remove the two flathead screws that secure the needle plate from the machine and remove the plate. You'll have a top view of the bobbin housing and see the thread that's stuck to it.

Just click below for the guide how to put the needle ;

Sewing Machine 101- Sewing For Dudes (and Ladies) No. 2: Stitches ...
Anatomy of a Sewing Machine. 1) Bobbin winder 2) Spool pin 3) Thread guide 4) Tension Knob 5) Foot and needle 6) Bobbin housing regards,

Hope it may helps you;

Regards,
VOTIT