Full fibre network identified by smart tv . I seem to connect ok but when I then try to access error

[tdjw+sad]

I have had full fibre installation today . Engineer said external wall of property was best location. I have linked mobile phones ,iPad , Google nest wirelessly . However when following instructions to link LG smart tv , it identifies new network. I set it up wirelessly and it says it's connected .  But when I try to access anything requiring internet it says there is a problem with the internet connection and takes me to settings , sky router , wps button (does it have one) and hangs there. 
Is it just impossible to link  to full fibre router wirelessly?

[TimmyBGood]

@tdjw+sad 

With a white Max Hub you may need to reduce the wireless security level from WPA3-T to WPA2-PSK using the Hub settings in the My Sky app.

[TimmyBGood · Accepted solution]

---

@tdjw+sad wrote:

 wps button (does it have one) 

---

The WPS button is low down on the right hand side of the enclosure.