@suzanner I hope this site might be helpful for you since it was more explanation for me on what to do. I thought it was going to be easy for this extender to work. Hmmm. Not so much.

https://www.tp-link.com/us/support/faq/2793/

This support page shows how you must "login" and make a password using the app. (Change the login account + password for the TPLink device via Tether App)
https://www.tp-link.com/us/support/faq/2793/ 2793

Here is how to work with the Web management page:

https://www.tp-link.com/us/support/faq/1398/ 

Here are some "how-to" videos that might be helpful.

https://www.tp-link.com/us/support/setup-video/ 

I do not work for this company, but I have spent hours today trying to figure out how to make this extender work. Sigh. I hope some of these sites help you.

mj