Hello. I've come across this problem for the first time when I tried to use prime video. I could not logg into the website, because it was looping on some screenshot about function that is not aviable in my region. When I contacted Amazon's support they said that this is the VPN problem and I should disable it. Even though I did disable VPN earlier.
Next time I tried to make an account in Ikea, and the same thing happend. I got error that said they flagged me as a bot because of my VPN, which was disabled for a long time.
What can I do? Clear cache files or cookies?