Wifi not showing up when configuring the monitor

I’m writing to ask for help with configuring the air quality monitor: my laptop can detect both the Purple Air hotspot and the desired wifi that I hope to connect the monitor to. However, the desired wifi would not show up on the list of networks the monitor can connect to. Please advise and thank you!

I’m having issues with another one of the Purple Air monitor. I have configured and registered that one and it was reporting, but it stopped after a few days and only unplugging and replugging can get it back online.

Please let me know and thank you for your help!