What router are you connecting to? I couldn't find a 6038 router
What extender are you using? AC1000 is a speed and not a model.
Firmware on the extender?
Firmware on the router?
Are you trying to setup via wps or manual setup?
Maybe the password is incorrect. Have you tried logging into your router and resetting the password? make sure to avoid special characters or spaces as some can cause issues.
go to netgear.com/support/ you can type in your model number and get install guides, video guides, manuals, and firmware. As well as if you just bought the extender, you can use your 90 days of free support. to do so, click mynetgear at the top, register an account and your device. From there you can contact support.
