This article is also available in:
Minecraft | Error: Unable to access jarfile server.jar

Go to and click on your server

Go to Change Version in top menu.

You can install a new server jar. We recommend to use PaperSpigot as it is more optimized than Spigot and Bukkit (also, bukkit will be disabled in the future)

Click YES

Once it is done, go to your Server Console and start your server.

If you are trying to run Forge on your server, please visit this link

All done! Your server should now be working properly!
Was this article helpful?
Thank you!