First you need to locate the AVA game Config folder
[The default folder should be "C:\AeriaGames\AVA\avaGame\Config" or possibly "C:\Program Files\AeriaGames\AVA\avaGame\Config"]
Within this folder should be a file called "AVAOptionSettings.ini" (the ".ini" may not be there depending on your folder options)
Within this file should be a line called "bFullScreen=true" and we will change this to "bFullScreen=false" Save the changes and close out any open windows and start the game.
The reason why AVA has the screen issue is because sometimes with fps games, there lobby window cannot properly be played in full screen on some systems. This change will tell the game to change the lobby window from full screen to windowed mode (but do not worry, the game will play in full screen)
I have tested this fix for the past week and had found no current issues. However, if there are any further questions or concerned about this fix, feel free to contact me at "firstname.lastname@example.org" (btw this is my actual email lol)
BTW, you do not need to include the quotation marks ("")