I have a Tp-Link, AC1750, Model RE450 and need to configure as a ab access point. My house is build of concrete and therefor the signal from the extender is very slow. I connected an Ethernet cable to link the range extender on the first floor and the router on the first floor but it does not work because I do not know how to configure the range extender as an access point.  Would greatly appreciate any help you can give me and detailed instructions, a video or a manual on how to do this.

Thank you for your help