Plugins don't work on spigot

I added plugins to my server that I could play with friends on it and some of them don't work like GUIshop after I edited all the prices, when I do /shop it doesn't let me enter the shops I can pick up the things in /shop like xp bottle, emerald and such and I don't know what is the way to fix it.

The second plugin that is buggy is the power ranks plugin. I added that plugin so I can have a title owner but since I added payable ranks (rankup plugin)

and deleted power ranks it added some problems with the deletion and now when I ranked up to starter rank, when I type in chat it says [NM NW NB] and not starter rank so please if anyone could help it would be greatly appreciated. Thanks anyways!

https://mclo.gs/oFSS7RE

Those are the server logs.

I have vault and silkspawners on my server.

Thank you for helping me with the shop. With the power ranks or rankup plugin im having a problem I deleted power ranks but it keeps showing beside the name [NM NW NB] and I don't know which plugin does it because it says that im a starter rank. I didn't know how to fix it so I came up to you. This is what happens: https://cdn.discordapp.com/att…2496834584576/unknown.png

Those are my logs: https://mclo.gs/xc29UcI