Cannot connect to Alexa

I'm completely stuck here, is there a solution? Tapping 'Agree and Link' doesn't respond. It does respond to 'Cancel'.
Dear User,

Thank you for contacting us. 
Please check that your device is connected to a 2.4 GHz Wi‑Fi network (not 5 GHz), then restart the device and try again. 
If you need further assistance, please let us know.

Best regards,
Lepro Customer Service Team