Specific word not registering as possible move when it should

Given a rack "IMRY ST", board with "Quoif" (from the UK collins word list) played at (x,y) = (3,3) to the right, and "Fiord" played at (7, 3) down, "ministry" should be a valid word to be played at (4, 4) right for 109 points. Currently, does not register as a possible move.