This means deleting their folder by hand and make sure there are no file-fragments left. Solution: Clean out your mods and then re-install them fresh. but that would be rather rare and it happening with multiple mods at the same time doesn't sound real. This could have different reasons - the most common is loading mods for a different basegame-version (like heavily outdated mods - pre-1.1 mods - etc.) - it also could be that it's some sort of data-corruption, like with mod-updates fucking something up for a reason - of course it could just be the mod-creator(s) putting a wrong letter somewhere. Some mods are throwing Package.ID errors.
