Seeing An error occurred (InsufficientInstanceCapacity) in slurm_resume.log when I fail to run a job, or in clustermgtd.log, when I fail to create a cluster - Amazon ParallelCluster
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Seeing An error occurred (InsufficientInstanceCapacity) in slurm_resume.log when I fail to run a job, or in clustermgtd.log, when I fail to create a cluster

You are experiencing an insufficient capacity issue. Follow https://aws.amazon.com/premiumsupport/knowledge-center/ec2-insufficient-capacity-errors/ to troubleshoot the issue.