whenever i try to use placeholder api i will get the error of ERROR:me.lucko.luckperms.sponge.service.reference.CachedSubjectReference Cannot be cast to org.spongepowered.api.service.permission.subject in virtual chest I am trying to use placholder apis %rank% or whatever it is and get that idk if it would just be the 1 thing as ive had nothing else to test it in but will later

Does papi have support for sponge?

Also have you downloaded LuckPerms sponge from jenkins?

Is there more errors?

This is a PlaceholderAPI issue - make sure you're using the latest version, and failing that, speak to the author and ask them to update the plugin to support newer Sponge API versions.