Originally Posted by
GE90-115B
Yes I've tried private/incognito mode but to no avail. These modes supposedly don't keep track of existing browsing history or cookies.
I've been trying to access from HKG if that matters.
That is highly relevant information. You will need to use an European or North American VPN to access the site. Many sites block access from outside of the geographic regions where the company operates to reduce the possibility of fraud and abuse.
You might also try using the EasyJet app and see if that works any better.