Resolving Authentication Conflict: Chat Validation Failure Issue between Velocity and Purpur 1.20.1

[adnogpu]

Hello, my server consists of Velocity and Purpur 1.20.1. It's an offline server, and on Velocity, I'm using the LimboAuth plugin, which allows me to perform authentication with the "premium" command. However, I have an issue. If I use "premium" to authenticate on Velocity and then join Purpur 1.20.1, whenever I send any messages, the Purpur server kicks me out and displays an error message saying "Chat message validation failed" (as shown in the screenshot). How can I resolve this issue?