I dont even remember honestly XD i dont think i ever figured it out. SkLib is an addon that hasnt been updated in years so maybe it just doesnt work well with skript variables. Now i just use mongoDB and rediskript for stuff like that. here is a link:
https://www.spigotmc.org/resources/rediskript-communicate-between-servers-with-ease.85067/
https://mongosk.romitou.fr/