To resolve the error "boto3 cannot save artifact to OutputPath in kubeflow pipeline", you can try the following steps:
Check the permissions for the output path and make sure the user running the pipeline has write access.
Verify that the output path is correctly specified in the pipeline configuration.
Ensure that the boto3 library is correctly installed and imported in the code.
Try to save the artifact to a local path first, and then upload it to the output path using boto3.
If you are still facing the error, try to print the error message and check the logs for more information.
Additionally, you can consider the following solutions:
Check if the S3 bucket mentioned in the output path exists and is accessible.
Make sure that the region specified in the boto3 client configuration is the same as the region of the S3 bucket.
Consider using the low-level client for S3 instead of the high-level resource, as it provides more control over the upload process.
If you are using kubeflow pipeline version 0.6.0 or later, try using the Kubernetes volume feature to persist the artifact outside the pipeline pod.
Finally, if none of the above solutions work, reach out to the kubeflow community or the boto3 support team for further assistance.