The E-E1 error on a Brother embroidery machine indicates a problem with the thread take-up mechanism. Here are some steps you can take to fix the issue:

1. Turn off the machine and unplug it from the power source. Wait for a few minutes before plugging it back in and turning it on again. This can reset the machine and clear any temporary glitches.
2. Check the thread path. Make sure the thread is threaded correctly and there are no obstructions or tangles in the thread path.
3. Check the needle. Make sure the needle is properly inserted and not bent or damaged.
4. Check the bobbin. Make sure the bobbin is inserted correctly and that the thread is unwinding smoothly.
5. Check the thread tension. Make sure the thread tension is set correctly for the type of fabric and thread you are using.
6. Check the take-up lever. Make sure the take-up lever is in the correct position and moving smoothly.
7. Check the machine for any signs of damage or wear. If any parts appear to be damaged or worn, they may need to be replaced.

If these steps do not solve the E-E1 error, it may indicate a more serious problem with the thread take-up mechanism or the machine’s internal components. In this case, it is best to contact a qualified technician or the manufacturer for assistance.