Cannot Select ZML

I have tried everything that has worked in the past- updated ZML, re-installed app, restarted iPhone 6s, shut down and restarted wifi, restarted router, turned Bluetooth off and on, made sure phone and laptop were on same wifi network, airplane mode with cell data definitely turned off but when I get to pairing screen, Bluetooth is the only selected option and I cannot select the ZML connection button as it is grayed out. What gives?