Hi i installed the Arkshop plugin on my test server, but when I enter /shop 2 in chat the server crash's, the crash report is shown below. I can view /shop and buy things without a crash but for some reason when /shop 2 is entered it crashes the server in seconds, i have added my .json file as...

Pained for the plugin, where do i put the rar file? i cant find how to install info.