Workflow Timing: Error loading charts.

Hi there,

I'm running the GATK4.1.0.0 gCNV cohort mode workflow and I get the following error for the Workflow Timing diagram: Error loading charts.

Any clue why I am getting this error and how I can fix this? The job completed successfully without error. I need the charts to get a sense of how long each task of the workflow takes. Thanks.