Plugin Version

I tried to use several versions

Plugin Config

Default

Server Version

1.15.2

Server Log

Only one message.

What other plugins are you running?

[List of your plugins, ideally with the version]

What is happening?

I create a shop but nobody can sell or buy

What did you expect to happen?

Buy and sell

Please provide the full server log.

Also you should make sure that players can interact with the sign (it might get blocked by other plugins, your spawn protection or them being in adventure/creative mode) as well as that they don't have the permissions to access that shop (can be toggled by using /csaccess or the config setting)

One second...

I tested with Vaul and EssentialsX. Not working!

Wait for lastest.log...

Lastest.log
https://pastebin.com/6Zi5SK9h

Yeah, there aren't any errors there. Please make sure that none of the other things an issue (access permissions without toggled /csaccess bypass, spawn protection, other protection plugins).

Also although probably unrelated to your problem you might want to update to EssentialsX, Essentials hasn't been maintained in years now.

I catch the problem. I was op. But now with TNE i have message: Economy account for this shop doesn't exists.

That you are going to have to resolve with TNE, I don't really know how all economy plugins work.