This article ONLY applies to you if you are 100% certain that:
- This is not a server-side issue (Check our Twitter @playWarframe to make sure there is no server-side hiccup going on).
- You entered the correct email and password the first attempt at the login screen of the game, and you can test it by logging in the same account here. (Please log out first if you have already logged in your account)
If you can successfully log in the account in question at Warframe.com, chances are the IP address you are currently using may be getting flagged at some point. Because some ISPs (Internet Service Provider) share IPv4 addresses between many people and that sometimes someone that you're sharing with has triggered security measures that prevent login. This is also very often caused by your ISP providing VPN services to some hackers who use it for evil and you are sharing the same IP range with them! So you might potentially solve this problem by 1) stop using VPN if you are using one, 2) test it using an alternative internet connection (such as your smartphone as a WI-FI hotspot or your neighbour/friend's internet, ideally a different ISP); 3) asking your ISP to change your internet connection from IPv4 to IPv6 (IPv6 users usually don't have this problem. Not sure if you are using IPv6? Give it a test here)
If none of the potential solutions above works for you or you are suffering from this issue while using IPv6, please get the log files in this link and send us a ticket!
This document will be updated should any new information on this topic arise.