Facebook are currently experiencing the issues that may cause some API requests to take longer or fail unexpectedly. Which may cause the game log in failed. Facebook are investigating the issue and working on a resolution.
We will inform you when this issue get fixed, apologize for the trouble this caused.
Our Website: https://incursion.gamesamba.com
Our Facebook: https://www.facebook.com/StarTrekADIncursion
Our Discord: https://discord.gg/fKfzAJ5
Star Trek™ Alien Domain: Incursion Operation Team