My Fitbit won’t restart or re-connect to iPhone

I tried to restart it and deleted and tried reading the device and it finds it but the 4 number identication doesn’t display on the screen to connect it.

please help

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

crwdns2934109:0crwdne2934109:0

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