Craig has left the club to take the vacant full-time position of First Team Coach at Connah's Quay Nomads.
Harrison expressed to the Football Club this morning that he wanted to leave to pursue a full -time role.
Compensation has been agreed between the two clubs and we wish Craig well in his new role.
Director of Football Stephen Vaughan Jnr will be taking charge of the First Team assisted by General Manager Luke Purcell and experienced non-league Manager Alan Lewer until further notice.
Stephen Vaughan Jnr said: "It has come as a great surprise this morning that Craig wanted to leave the Football Club Our attention not turns to tomorrow's Welsh Cup match Vs Mold Alexandra where we all need to pull together to ensure that we get through to the next round".