Every time that I try to update to version 1.12.1, I get this error:
Error [content0]game\player\playerwitcher.ws(1542): Could not find function 'RemoveOilBuff'
Error [content0]game\player\playerwitcher.ws(1592): Could not find function 'AddOilBuff'
Error [content0]game\player\playerwitcher.ws(4159): Could not find function 'RemoveOilBuff'
Error [modnowitchersense]game\gameplay\focus\focus.ws(194): Could not find function 'Log'
Error [modnowitchersense]game\gameplay\focus\focus.ws(248): Could not find function 'Log'
Error [content0]game\player\playerweaponholster.ws(501): Could not find function 'AddOilBuff'
Error [modnowitchersense]game\player\states\swimming.ws(247): Could not find function 'Log'
Anyone know how to fix this?

XD

I'm pretty sure he's referring to Leisure Suit Larry.

@OP: https://www.gog.com/forum/the_witcher_3_wild_hunt
However, if you're trying to update the game via Galaxy, and that's what's giving you the errors, you might be be better trying here.

There are three witcher games though, he should have been specific and tried that section. :P

Remove all offending mods and scripts.

This is on The Witcher 3: Wild Hunt

See? They still happen every so often. I almost miss the main board being inundated with Witcher 3 questions.

Still a lot better than threads like cats or rats, rats or bats, etc.

https://www.gog.com/forum/the_witcher_3_wild_hunt#1461208537

In case you missed this in my earlier post: The dedicated GOG forum for The Witcher 3 is ; however, if you're trying to update the game via Galaxy, and that's what's giving you the errors, you might want to post in the [url=https://www.gog.com/forum/general/gog_galaxy_beta_2]official Galaxy Beta thread (or in the Mantis bug report page you'll find a link to in that thread -- just read before posting).

But Hickory might be right -- if you have mods installed, you might try removing them, updating the game, then reinstalling the mods.