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# Minecraft | Error: Invalid or corrupt jarfile server.jar

# Minecraft | Error: Invalid or corrupt jarfile server.jar

## You will experience this issue if you try to manually upload a server.jar on your server files but it doesn't go well. It can be that the server.jar is corrupted in the first place or the server.jar failed uploading in the middle of the process

1. Go to the [Skynode Game Panel](https://panel.skynode.pro) and click on your server

2. Go to **Change Version** in top menu.

![](https://i.imgur.com/9FNFxH8.png)

3.  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)

![](https://i.imgur.com/LQ3jx3B.png)

4. Click **YES**

![](https://i.imgur.com/C1tmZgU.png)

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

**All done! Your server should now be working properly!**