Issues and Mistakes tend to happen, for me it works fine, forcing the window mode. Make a Shortcut of your GW2.exe and right-click and go into properties. After that just add -windowed to Target. Looks something like this "E:\Games\Guild Wars 2\Gw2-64.exe" -windowed. You can maximize in game again. Hope that works for you for now.
Can't launch game after the November 9, 2021 update
in Bugs: Game, Forum, Website
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