Using the pay command in the game, users get null error in response. The error came from the server in version 1.10 and I am currently using the plugin on the server with version 1.11.2. In the console I do not get errors.

Sure there's nothing in the console? check the latest.log file

Type /ess debug then reproduce the issue, you must then get an error in the console.

Was solved with the last update. I am thinking about the possibility that the problem was a mistake in the configuration files or in the storage of the data of the players. Was solved when I tried it on a new test server and I could not repeat the error.