Google Play not working on home wifi network

I've bought an ASUS Z300M tablet and Google Play wont log in when I'm on my home WIFI network. I managed to add a Google account and log into Play by setting up a personal hotspot from my iPhone sharing mobile data, but when I switch back to WIFI Play won't connect. I've tried clearing Google Play cash, deleted application data and even reset factory settings on the whole tablet. The problem seems to be with the router settings but I can't figure out what to adjust. I have a Technicolor TC2700U router provided by the ISP.

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