The Finisher Main Tray is not available

If I remove the finisher, the printer will print but when I reinstall it, it fails with the error in the title. I assume there is some sort of sensor that is failing. The finisher is receiving power. Any ideas?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0