I was able to download the next gen update from gog, and it was installed, however when I start the game, the red engine 3 app came up and start compiling some script, I assume it's part of the next gen update.

And after a few second the script compilation failed and I can't start the game. The compilation error is as follow, does anyone experience the same thing? Any solution?

Error [content0]game\gameplay\effects\effects\potion\blizzard.ws(59): Could not find function 'IsPlayerUnderAttack'
Error [content0]game\player\playerwitcher.ws(1976): Could not find function 'IsInCutsceneIntro'
Error [content0]game\vehicles\horse\horsecomponent.ws(247): Function 'IsMountedByPlayer' does not take 1 param(s)
Error [content0]game\vehicles\horse\horsecomponent.ws(360): Function 'IsMountedByPlayer' does not take 1 param(s)
Error [content0]game\photomodemanager.ws(82): Could not find function 'IsInCutsceneIntro'
Error [content0]game\gui\main_menu\ingamemenu.ws(1274): Could not find function 'SetInvertedLockOption'
Error [content0]game\gui\main_menu\ingamemenu.ws(1276): Could not find function 'SetInvertedLockOption'
Error [content0]game\gui\main_menu\ingamemenu.ws(1282): Could not find function 'SetInvertedCameraX'
Error [content0]game\gui\main_menu\ingamemenu.ws(1284): Could not find function 'SetInvertedCameraX'
Error [content0]game\gui\main_menu\ingamemenu.ws(1290): Could not find function 'SetInvertedCameraY'
Error [content0]game\gui\main_menu\ingamemenu.ws(1292): Could not find function 'SetInvertedCameraY'
Error [content0]game\gui\main_menu\ingamemenu.ws(1298): Could not find function 'SetInvertedMouseCameraX'
Error [content0]game\gui\main_menu\ingamemenu.ws(1300): Could not find function 'SetInvertedMouseCameraX'
Error [content0]game\gui\main_menu\ingamemenu.ws(1306): Could not find function 'SetInvertedMouseCameraY'
Error [content0]game\gui\main_menu\ingamemenu.ws(1308): Could not find function 'SetInvertedMouseCameraY'
Error [content0]game\behavior_tree\tasks\bttaskattack.ws(179): Could not find function 'SetPlayerUnderAttack'
Error [content0]game\behavior_tree\tasks\bttaskattack.ws(193): Could not find function 'SetPlayerUnderAttack'
Error [content0]game\behavior_tree\tasks\combat\bttaskshoot.ws(65): Could not find function 'SetPlayerUnderAttack'
Error [content0]game\behavior_tree\tasks\combat\bttaskshoot.ws(190): Could not find function 'SetPlayerUnderAttack'

Warning [modenablemimics_blinking]game\actor.ws(246): Native function 'IsPlayingChatScene' was not exported from class 'CActor' in C++ code.
Warning [content0]engine\environment.ws(30): Global native function 'EnableDebugOverlayFilter' was not exported from C++ code.
Warning [content0]engine\environment.ws(32): Global native function 'EnableDebugPostProcess' was not exported from C++ code.
Warning [content0]engine\showflags.ws(11): Global native function 'DebugSetEShowFlag' was not exported from C++ code.

Same thing here.. game will not run

Had the same issue, slightly different error messages.

Deleted all the mods in my Witcher 3/Mods folder and that fixed the issue. I previously had the Card Tracker and "Remove Dirty Lens Effect" mods in there. I'm guessing they're not compatible with the 4.0 patch.

Pretty much the same issue here, working on verifying the game files real quick. I didn't use mods, so I don't think that's it. If verifying doesn't work, I'll do a full reinstall (want to get it on my new SSD anyways) and see if that fixes it.

UPDATE: Reinstalling fixed it. I must have installed a mod and forgotten or something. Now, if only it ran properly with raytracing... both this AND Cyberpunk run unimpressively on my new RTX 3070 with raytracing enabled and it's disappointing.

The other improvements, on the other hand, are quite nice and still make the game look a bit better.

Same problem, if i delete mod: modW3EE its working but not with localization and i can chose from 6 language. This mode is instaled with clear instal, without added mods.

Error [content0]game\gui\commonmainmenubase.ws(266): Found unexpected ')'
Error [content0]game\gui\commonmainmenubase.ws(267): Found unexpected '}'
Error [content0]game\gui\commonmainmenubase.ws(268): Found unexpected '}'
Error [content0]game\gui\hud\modules\hudmoduledeathscreen.ws(156): Found unexpected '}'
Error [content0]game\gui\hud\modules\hudmoduledeathscreen.ws(169): Found unexpected '}'
Error [content0]game\gui\menus\deathscreenmenu.ws(196): Found unexpected ')'
Error [content0]game\gui\menus\deathscreenmenu.ws(197): Found unexpected '}'
Error [content0]game\gui\menus\deathscreenmenu.ws(216): Found unexpected '}'
Error [content0]game\gui\menus\startscreenmenubase.ws(119): Found unexpected '}'


Any option how fix it without lose my home language?

you can try script merger, maybe it'll help. wish you luck

Only install mods that say for next gen or 4.0. Also don't use script merger. This caused nothing but problems for me. If you look at the mods that say newest they should pretty all be for 4.0 update. I have 6 new mods installed and did not use script merger and everything works fine.