Hello @Blother ,

Welcome to our community.

If you forgot the Wi-Fi password for the extender.
    1. Once set up, the extender's Wi-Fi password is the same as your router's.
    2. Open the Tether App, log into the extender under Devices, and tap Extended Network to view the Wi-Fi password. 
    3. Reach out to your router's support for the Wi-Fi password. 
    4. If the router's Wi-Fi password isn't working, hard reset the extender and follow the Tether app's instructions to set it up again.

Best Regards.