My machine jammed/bent needle & gave error message

Initially, the "safety device has been activated" error is usually caused by a jammed thread or fabric.
2 possible causes
The upper thread has become tangled around the bobbin case,
The needle is bent and hitting the needle plate, so the machine stops.
To fix this error.
1, Unplug your machine,
2. Remove the needle ( I know it is in a down position and locked up) but you can be able to remove it.
3. After removing the needle, turn your hand wheel if still locked up or stiff. Remove your needle plate and remove all your threads both upper and lower.
4. Clean your bobbin area using a brush take a deep breath then blow.
5. After that, try to turn your hand wheel again, if the hand wheel moves freely, rethread your machine and replace your needle with a new one. Then try to sew a few stitches using a hand wheel (do not sew using a pedal) if the hand wheel creates stitches that is the time to sew using the pedal.
If the problem is still there, you possibly have broken gear that needs to be replaced

If the safety has been activated, there is something wrong with the machine that could potentially be dangerous--to the machine or you. You should probably take it to a technician.

Then check for a jam from a foreign object like cloth or a broken needle or thread clogging up the works

Turn the machine off. Check for a broken or bent needle or a bird's nest in the bobbin area. Sometimes when I try to put an extra heavy piece through the machine I' ll get that message. The most common reason for the error is a broken or bent needle.

The noise is because the machine is trying to raise or lower a needle and can't move. Several things to check. Did the needle break and jam in the bottom thread? Is the needle bent or jam? Did the thread jam in the bobbin area? I had a 'knot' of thread build up on the bottom and it hooked itself into the metal clip on the bobbin so that the needle couldn't raise. If thread jams in the bottom carefully cut the threads until you can free the hoop and material. Then check to make sure all pieces of thread and fuzz has been removed in the bobbin case. If it happens again check to see if the bobbin case or the throat plate is scratched or bent. If you are stitching Free Standing Lace on this machine or a piece with over 20,000 stitches I recommend starting with a new full bobbin and a new needle. As you get toward the bottom of the bobbin, thread seems to have a high likelihood of tangling or looping.

Time to take it for service. There is a fault that will not allow your machine to advance to the next step. It stops for safety reasons.

I would suggest rethreading the machine to make sure the thread is not caught somewhere, & even change the needle or check to make sure the needle is in correctly & pushed all the way up in the needle holder
& if that doens't help then take it back to the repair shop & tell them about the problem

Sounds like the shuttle needs to be cleaned.

Turn off the power and open the needle plate.

Remove the bobbin and bobbin case.

Clean the area from lint and any thread that may be trapped.

When you get that error message it usally means there is a jam in the machine that is causing the motor to work to hard so it keeps you from burning up the motor try taking your needle plate off and bobbin case out and then put your needle plate back on and then the bobbin case if that doesnt work try looking at the take-up lever there might be thread wraped around it soaking up the oil and causing a bind

i am not familiar with the brother safety device myself. however things i would check might be to first check the manual for the machine. if not available try to turn the machine off if it is electronic in hope that it would reset itself. i would also totally unthread the machine and change the needle. embroidery machines need to have needles changed more often due to their high speeds.What type of fabric were you sewing on? Some of the newer machines are just not made to sew on very heavy fabrics and this might be causing something in side to spring. Try to stitch on a lighter fabric with a stabilizer under it