I do not know the exact remedy, but doing a quick search (which I consistently suggest to do in a thorough fashion before posting here) points out you may not be using a strong enough VPN when connecting to a geographically locked content server, like the US. My suggestion would be to get a premium VPN service or to use a DNS service. Thankfully, they both need not be taken up explicitly.
Check these two posts out on how to get KeepSolid’s VPN and SmartDNS subscription for 2 and 3 months respectively, and let the community know if you still face any issues:
Rinse, and repeat. Good Luck.