In order to ensure fair utilization of DevCloud resources by all, DevCloud Team have set a maximum limit on number of jobs that can be run by a specific user. This may be the reason for your issue.
The limit of total running jobs per person is 15. It allows up to 15 running jobs per user, and each job can request up to 5 nodes.
Please refer the below link mentioning the same.
For more complete information about compiler optimizations, see our Optimization Notice.