Information

EssentialsX version 2.0.1-b601

Server software: This server is running CraftBukkit version git-Spigot-3fb9445-6e3cec8 (MC: 1.11.2) (Implementing API version 1.11.2-R0.1-SNAPSHOT)

EssentialsX config:
https://gist.github.com/AzDreamerr/ce8f26a185db692d50c7ed76dd55808c

Details

When I use {UNIQUE} in announce-format (Welcome message for newbies) and when the count of players is more than 999 it write : 1(NBSP symbol in square)000 but not just 1 000
You can see example here:

Translation: "Welcome, qwerty12345! You're the 1(strange symbol)255 player on our server SIlentWorld"

This looks like an issue with the text encoding of a config file, but I don't know for certain.

@md678685 Then how can I fix this if the problem is in text encoding?

@AzDreamerr are you using an edited messages.properties file? If you are, could you paste it on Gist?

You can try downloading Bluefish from http://bluefish.openoffice.nl/ and editing your yml with it. You can set character encoding of the file by going to Documents then to character encoding, then just save at the end.
https://prnt.sc/ii1c98

@md678685 I didn't change anything in .jar
The only unusual thing is that I changed default language to Russian. I can find the same problem in /gc when any number is more than 999