World Connection Failure 4216 What is error code?

1 min

The 4216 error that occurs during World play occurs when there is an error in the server code you created.

Please try to find the error in your onCreate / onJoin / onLeave or Message Event and fix it.
It is recommended to use Nullable or try-catch syntax to resolve issues with code stability and exception handling.

Please check the caveats for writing server code.

📘 Please refer to the following guide. [Precautions when using server code]