"Failed to CreateGameWindow. Resolution (1280x720) unsupported?" error

SOLVED:

In addition to what I tried earlier. I also tried this.

What you need to do is find the two lines; (C:\Users\"username"\Documents\Respawn\Apex\local)

"setting.fullscreen" "1"
"setting.nowindowborder" "0"

This is telling the game to launch in fullscreen mode, all you need to do is change them to;

"setting.fullscreen" "0"
"setting.nowindowborder" "1"