Just Bought, But Invalid licence

[Rabbit Dark]

Plugin version: v8.1.0

Spigot username: DarkXrabbit

Issue: Invalid licence, even all of servers are under same IPv4. (So many servers because of the worldborder fills very slow, so I created about ten server to run this….)

Link to error log: https://pastebin.com/RvPV0zmD

Screenshot: https://imgur.com/a/TwSzV8X