A JNI error has been causing some Minecraft users from entering the game. Here's how you can fix this issue.

If you encounter the "missing profile public key" as server administrators, then there may be a fix worth exploring that can disable the need for secure connections via the server.properties file.

Protocol: play Flow: CLIENTBOUND Is Local: false Server type: OTHER Server brand: Spigot -- System Details -- Details: Minecraft Version: 1.21.4 Minecraft Version ID: 1.21.4 Operating System: Windows ...