Can't use /drop

So i’m a server owner and i can drop weapons but when other players try /drop the command pops up in chat and they’re name is light green than normal and it won’t drop (it also appears as a global message).
Please help because i do not know what to do i’ve already tried clearing Ulx permissions.

The command probably is restricted. Look on URS (Ulysses Restriction System). Or are you using DarkRP? Because ULX does not use / commands.