I correctly connected (and used) the wifi extender to my home wifi net.
Then, the extender was disconnected from the electricity grid for a couple of days.
Now, my wifi net correctly works. I can see the extended net (_ext) but when I try to connect, it asks for the password (which has been never changed and correctly works in the unextended net) but I always receive the message "wrong password".
I hope to be clear.
Please excuse me for my bad English.
Thanks for your help
Try factory resetting it and reinstalling it. Maybe something was corrupted when the power was lost.
I had already tried factory resetting without results.
I have been able to solve my problem by using two different passwords: one for the router and the other for the extender.