EMR Serverless Custom Image failure

Hi.

I have set up an EMR Serverless application to run a simple Hello World spark job. I've configured everything properly and the job execution is successful.

Next, I've created a custom image according to the official docs:
https://docs.aws.amazon.com/emr/latest/EMR-Serverless-UserGuide/application-custom-image.html

However, once I've updated the application to use the custom image and submitted the same Spark job it fails. No logs are available and no clue about the error cause.

Please advise a possible solution.

Thanks.