Hi peeps,
Been having the same issue as of late.
So far I've done quite a few things that don't work but finally stumbled on a temporary fix.
By changing my screen resolution I finally got my game to launch but with black screen still on it. For some that might work.
For me what really worked was changing my monitor refresh rate/or coincidence ..
Updated video drivers, turned off third party software such as MSI, restarted PC. Tried creating a repair launcher but that didn't work.
Soon a hot fix will be made by ArenaNet, so far I hope changing your resolution or refresh rate helps.
Stay strong brothers.