The container was killed as it exceeded the memory limit of 4g.

When I submitted the results for the Medical Segmentation Decathlon, there was this problem: The container was killed as it exceeded the memory limit of 4g. What should I do to solve this problem?

Please contact the administrators of that challenge who should be able to help you resolve this.

I have contacted the organizer of the contest and sent an email, but no response was received.

Give them some time, it's really up to the challenge administrators to handle this: there might be a reason for the limit.