i've been using Dispenser.tf for a while but today noticed this new key credit system... got now idea how it works and couldn't find a tutorial. now when i try to deposit keys i click on Team Fortress 2 tab it says fetching from steam and then "no inventory" i'm 100% sure that i have keys in my inventory but its not detecting them, HELP!

its working now, idk what fixed it but its working!

Nothing has been changed. It will say no inventory if we are unable to fetch your inventory information (Steam lag or down). The problem could be just temporary.