HG633 WiFi 5GHz AC does not work

Hi folks,

Can't connect to HG633 on 5GHz AC. My workstation (Edimax WiFi 5Ghz AC dongle) does show the signal as N, although I see in the HG633 settings the AC support enabled.

Apart of these mentioned by many others huge amount of errors in 2.4GHz part, this AC issue makes me to cancel fibre and roll back to slower service where my old (BTHomehub4) router worked perfectly. Or, any chance get BTHomehub4 online on TT fibre service? AFAIK it does do VDSL2 but did not sync on my line.

Thanks.