Personally I would always use an UpStream2 PRO as it has a Wired LAN connection and this avoids the situation of connecting to a WiFi network before anything works. However that does not help you
If you can get a cable in there I would ask Arylic to exchange products (the price difference is very low).
Otherwise can you explain a little bit more about you’re experience ?
Is the white light flashing fast ?
Can you see the Arylic SSID ?
When you try to connect to Arylic SSID what message do you get ?
What Mobile App (Tablet/Phone) (Android/iOS) ?
Do you have access to another (Tablet/Phone) ? Is the result the same ?