Free servers may not be stable. If you are using free servers, we would suggest you to try VIP servers with 7-day free trial subscription inside X-VPN.
You may also check the following tips :
1.Retry after a while, because we keep updating IP addresses, it may start to work anytime.
2.Try every protocol to see which works for you now. We suggest you start with protocol D.
Protocol on Mobile Protocol on PC
3. Change to different servers, we would suggest you try Germany servers first.