"errors in currently selected datapacks" - with no mods!

[kerfein]

Hi all.

 

I have recently invested about 50 hours into a solo map that I'm really starting to enjoy. All of a sudden when I launch the singleplayer map now, I get the classic "errors in currently selected datapacks" message. Research online always seems to suggest it's a problem with a mod, and that removing them all and slowly adding them back will find the erroring mod.

 

However I have never played with any mods. No texture packs, nothing. Vanilla MC. film plus

 

I have tried the "Optimize world" option, with and without delete local cache, to no avail. I have an offline copy of my world just in case.

 

Does anyone know what I can do to resurrect my map? bee tv

Edited December 26, 2022 by kerfein
spelling mistake

[ChampionAsh5357]

If this is a vanilla error, then I'm not sure what help you are expecting to receive from a mod loader. You can attempt to post the debug.log containing the error.