Solved Need help with rank up plugin

I am currently looking for a plugin that supports group manager and can simply take peoples money in exchange for the next rank. Dose anyone have a link to some plugins that i can use? If not can some one fix this one? https://dev.bukkit.org/projects/paidranks The problem with this one is that when the player dose not have enough money to rank up. Instead of say not enough money it saids internal error while attempting to preform this command.