Javascript error when creating new Export process

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 Beta 6
• Fix Version/s: 7.0.0 Beta 6
• Component/s: JS APIs and Utilities, Staging, Staging > Export/Import
• Labels: None
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/35593

Steps to reproduce:
1-Go to menu --> Liferay -> Publishing tools.
2-Click on "Export"
3-Click on "Plus" sign (new item).

Javascript error is thrown:

Uncaught TypeError: Cannot read property 'item' of undefined