Maybe your country is blocking the access then, or whatever does it.
Do you get any cloudflare website or just "cannot load"?
I tried with 3 browsers, phone network, phone wlan (mine, open other), with VPN and without. Works okay.
https://us.tamrieltradecentre.com/pc/Trade
https://eu.tamrieltradecentre.com/pc/Trade
Swithcign language to En does not work somehow, but using the direct link does it:
https://us.tamrieltradecentre.com/pc/Trade?lang=en-EN
https://eu.tamrieltradecentre.com/pc/Trade?lang=en-EN