New lights or used? The new app or the older reef nexus app? Asking because I recently saw a post where someone purchased a used photon and it would not connect to the new app. Reef breeders had them instal the old app and they connected. I don't know the details as I'm still on the old app but there is a migration process that has to be performed before using the new app on photons.
Maybe reach out Reef breeders via theirs website contact form. Everything I've read says they are very responsive and helpful. One post a member said Logan the owner or one of the owners worked him through things over the phone on a Sunday.
EDIT: found the thread I was referencing.
https://www.reef2reef.com/threads/huge-shoutout-to-reefbreeders.1097576/#post-13315519