You can't have two SignShop jars in your plugins folder and you need to have vault and an economy plugin supported by vault.

okay I removed the other signshop I accidentally added before and downloaded vault but it doesn't work

I assure you the plugin does work, lol. Did you install an economy plugin? Pastebin your startup log.

umm here it is https://pastebin.com/3x2VmGiM
I use the essentsials economy

Stop the server then download the latest version of SignShop(v3.4.4) remove version 3.4.0 and if you have shops made from before then rename the backup to sellers.yml and remove the other one. If you do not have shops from before then you can just delete the SignShop folder. Start the server, do not reload or use plugman.

I tried that before and it didn't work. But now it does!!! Thank u man!

You are welcome. It probably didn't work before because you had two SignShop jars in the plugins folder.

Okay now I got it, but when I use the sell shops it asks me if I wanna sell. How to I get rid of that/say yes?

Oh wait, it works now.

Unless I am misunderstanding your issue you need to right click instead of left clicking. If right clicking does not help, post a screenshot of the message. You could also join the discord https://discord.gg/czPJg7a

Got it to work now. Joined the server if i need anything else. Thank u for all the help!

[Server thread/ERROR]: Ambiguous plugin name SignShop' for files plugins\SignShop-3.4.4.jar' and plugins\SignShop-3.4.0.jar' in plugins'
[17:37:40] [Server thread/ERROR]: Could not load 'plugins\SignShop-3.4.4.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: Vault

Umm... What?