try to install new mod requsting placebo.
i have old ver and save working ok but [other than placebo] new mod brake the game[no main manu]
i have 6.4.2 for 1.18.2 and when i install 6.6.2 1.18.2 the save will not load [main manu ok but no load save has to load vinala or go back to main manu].
remove [other than placebo] new mod and try again but save will not load [main manu ok but no load save has to load vinala or go back to main manu].
latest.log

Log attach

when you update placebo to a new minor version (major.minor.patch) you need to update mods that depend on placebo.