Hello, I've having this problem since the last update, I try to use old comps and an error pop up, i don't know if it's a language issue, or something else, pls help
this is an error because the original expression was written in english and you are using a localized version of After Effects. In you expression, replace ("Slider Control") by (1) and your expression will be fixed.
"Slider Control" is the english name of that controller, and 1 is it's index in the effect list, so it won't try to find it by it's name, and because of that, fix the issue.