I need help w/ the omnipod + dexcom

hi! so my phone was recently added to the list of compatible devices for the omnipod 5 app, and both my pod and dexcom needed new sites. i tried to enter my dexcom’s sn into the omnipod app and it wouldn’t let me save it… so i disconnected it from both the omnipod app and the dexcom and put in a new one (probably a fault on my end) and switched back to my pdm, and now my pdm won’t accept the new sn even though i disconnected the old one. the dexcom app is working fine so im not sure what to do…

What happens when you try to enter the SN?