Cause and Solution 1:

This message is displayed when the thumb screws of the embroidery frame holder are loose. Using the included 3 way screwdriver, firmly tighten the two thumb screws.

Cause and Solution 2:

This message is displayed when the installed embroidery frame is too small.
Check which embroidery frames can be used, and then install a larger embroidery frame.
For details, see "How do I attach or remove the embroidery frame ?" .