Warning 041: {xjlink-connector} connections: No connection is defined from a ground pin on {xjlink-connector} to a ground net on the board

xjlink-connector connections: No connection is defined from a ground pin on xjlink-connector to a ground net on the board. Lack of a ground connection could cause unexpected circuit behaviour.

The cabling from the XJLink header to the board has been at least partially defined, but none of the ground pins on the XJLink as specified on the Pin Mapping are connected to ground nets on the board.