Troubleshooting

Common issues

Use this list for common setup and first-run failures.

Unreal reports missing modules

Confirm that the downloaded archive matches your Unreal Engine version. If the version is correct, delete Binaries and Intermediate from the copied plugin folder and open the project again.

The toolbar button is missing

Open Edit > Plugins, search for Kismet, enable the plugin for the project, and restart the editor.

Sign-in does not complete

Confirm that the browser flow finished successfully, then reopen the Kismet panel. If the editor still shows a signed-out state, sign out and try the flow again.

The API key is not accepted

Check that the key is an Anthropic API key, not a Kismet account password or another provider key. Paste it again and save.

The agent does not start

Confirm that you are signed in, your Anthropic API key is saved, and the Blueprint you want to edit is open.

The Blueprint does not compile

Read the compile error, then ask Kismet to fix that exact error. Include the error text if it is not already visible in the Kismet panel.