What/Where is the issue ?

When creating a process instance - duration report and then switching the view to flow node/ user task, Optimize crashes with an error.

Environment: C7/ C8SaaS/ C8SM

Optimize version : 3.10
ES version : 7.17
OS + Browser version : MacOs + Chrome:latest

Steps to reproduce:

• Create a new report with any process definition
• Select view: process instance - duration
• Select visualization: number
• Switch the view to flownode or usertask

Observed behavior:

Optimize crashes with the an error shown in the attached image.

Expected behavior:

Optimize does not crash and switches to a flow node/ user task report.

Additional Information:

It seems that this bug started happening when we disabled automatic report preview.