Microsoft is moving all Mojang accounts to Microsoft accounts. This breaks Minecraft Java on RPi, but a fix is in the works and will take a while to be released.
Sign the petition: https://feedback.minecraft.net/hc/en-us/community/posts/360075486052-Port-the-latest-Java-Minecraft-Launcher-to-the-Raspberry-Pi
NOTE: For better performance and smooth FPS, we reccomend a version like 1.12.2 + Optifine as it doesn't have the laggyness.
NOTE: For best performance, we reccomend a version like 1.12.2 + Optifine.
Minecraft Java edition for the raspberry pi
To maximize performance and to get solid 60fps, please follow ETA Prime's excellent walkthrough video: https://www.youtube.com/watch?v=oqNWJ52DLes