Wi-Fi Protected Setup (WPS) is a security risk and some devices have trouble connecting to networks using it. Turn it off or disable it or whatever and see if that helps.
If still no go login to the router and set the Encryption (or Security) Mode to 'off' or 'none' or similar (before changing it you can take note of what you are using now).
If still no go login to the router and set the Encryption (or Security) Mode to 'off' or 'none' or similar (before changing it you can take note of what you are using now).