NobodyNotable

Steam will launch the game instantly under a few instances- The skyrim_launcher.exe has been replaced by the game executable (or skse's executable). This would be a manual thing, like a drag/drop. Steam, Vortex, nor SKSE do this in an automated fashion. the game is started with an unusual Launch option (one that I'm not familiar with) to skip the game. the game is launched via a short-cut outside of steam.In the case of 1, you can fix this by verifying the game local files (don't forget to re-do the xedit clean of the plugins). In the case of 2, remove the launch option from the general tab of the game itself. In the case of 3, launch the game from within steam's window, under library. other than that, your guess is as good as mine?

Vortex uses a registry key to find the Skyrim executable, and that key is populated by the launcher. Maybe that's un-set or got changed out/corrupted/busted/moved? To test that: Close vortex Run the Skyrim SE/AE launcher (default function in Steam, or GOG; it's the thing that offers to check your video settings, has "Play" "options" "Support", etc). Once the launcher has launched, but *before* you hit "Play", exit the launcher. Try Vortex again Good luck!

There's a fix for this, restart your vortex and it should download the update.

Posted a solution in a similar thread (Same issue) https://forums.nexusmods.com/index.php?/topic/12962592-skyrim-se-game-extention-not-loaded/

Found a temporary fix, posted in a similar thread (same issue): https://forums.nexusmods.com/index.php?/topic/12962592-skyrim-se-game-extention-not-loaded/

It's a hack, but it should work until the extension update is updated. edit: don't forget to restart Vortex afterwards!

Edit: Fix is up, please don't do the below steps in this post. Found a fix: In: change this section and add the requiredFiles: [], line C:\users\YOUR-USER\AppData\Roaming\Vortex\plugins\Vortex Extension Update - Skyrim_ Special Edition v1.0.4\index.js { id: 'creation-kit-64', name: 'Creation Kit', executable: () => 'CreationKit.exe', requiredFiles: [], logo: 'CK.png', relative: true, } ];