Paper 1.16.5 Java 17 !exclusive! -

Note: The --add-opens flag helps older plugins interact with the newer Java environment without crashing. Performance Tuning Tips

When using Java 17 for a version of Minecraft that predates it, you may need to add specific flags to prevent "Illegal Access" warnings. Use a startup script similar to this: paper 1.16.5 java 17

(or Java 8), not Java 17

java -DPaper.IgnoreJavaVersion=true -Xmx4G -Xms4G -jar paper- .jar nogui Use code with caution. Copied to clipboard Compatibility Requirements Note: The --add-opens flag helps older plugins interact

Wait, this shouldn't happen with 1.16.5 – means you accidentally downloaded a Paper 1.17+ jar. Redownload build 794. paper 1.16.5 java 17