Fix NotImplementedError

✅ Solution

The "NotImplementedError" in Unsloth usually means a function or feature you're trying to use, like GRPO, hasn't been fully implemented for the specific model architecture or configuration you're using (e.g., Qwen3 with certain settings). To fix it, either choose a supported model/feature combination as specified in Unsloth's documentation, or check the Unsloth GitHub repository for ongoing issue resolutions/PRs related to unimplemented features and apply relevant fixes/workarounds if available. As a last resort, consider adapting the feature's implementation to the unsupported model architecture and create pull request.