TypeError: Cannot read properties of undefined (reading 'parent')

[Muhammad Faheem Akhtar]

Is there an existing issue for this?

• I have searched this repository's issues and believe that this is not a duplicate.

I'm using ...

React Scheduler

Current Behaviour

I am trying to use the custom plugin from #2820 but the scheduler is crashing with this error.

the item array has no elements and reading item[0] is causing the issue.

It seems to work correctly on the code sandbox. What might be the issue on my end?

Expected Behaviour

Should not crash.

Steps to Reproduce

No steps.

Works without the issue on sandbox: https://codesandbox.io/s/devextreme-react-scheduler-for-material-ui-forked-tu6csf?file=/index.js

Environment

• devextreme-reactive: 2.7.6
• react: 17.0.2
• browser: chrome (latest)
• bootstrap: none
• react-bootstrap: none
• material-ui: 4.12.3

[Muhammad Faheem Akhtar]

Update: Changing cellDuration to 30 stopped crashing it. Not sure if it is just random or really works

Update: Not working.

<WeekView
  startDayHour={0}
  endDayHour={24}
  cellDuration={30}
 />