If you are looking for a "fix" to get 1.20 working, be cautious of fake download links. The safest way to play is through verified community repositories or established sites: Official Eaglercraft Site for the latest stable releases. WebAssembly (WASM)

to prevent the game from running "too fast" and choking the browser's event loop, which causes input lag. Chunk Render Distance as low as possible to stabilize FPS. Fix Connection Issues Ensure all players use the same Shared World Relay URLs

java -jar EaglercraftServer.jar --port 8081