Exit Code 1 means "The game crashed".

What next?

You'll need to find and share your logs. Logs are far more actionable than the "exit code". They are very important for diagnosing all sorts of Minecraft problems.

The process to find your logs varies per launcher.

CurseForge

Right-click your modpack and select "Open Folder".

Navigate into the folder called logs and look for the file named latest.log.

More information.

Prism Launcher

Right-click your modpack and select "Folder". Open the folder called .minecraft.

Navigate into the folder called logs and look for the file named latest.log.

Official/vanilla launcher

Windows: Open Explorer, click inside the address bar, and enter %APPDATA%/.minecraft. Press Enter.

Navigate into the folder called logs and look for the file named latest.log.

More information.

Uploading

Once you have your logs, upload them to a paste site. Logs are long, so don't paste them directly into your post.

Here are some nice paste sites:

• mclo.gs (my personal favorite)
• paste.gg
• paste.ee
• Hastebin

If you're sharing logs somewhere that supports attachments (like a Discord channel or GitHub issue), you can also attach your logs as a file.

Good luck

Minecraft problems are really frustating. Good luck getting your problem solved!