Issue Description: By following this article, I'm unable to proceed after step 5 and facing Null Pointer exceptions in the Liferay console with the UI error message. It's changing the app version which is as expected but when clicking the app again to modify or edit anything then facing an error. Its showing version 1.0 which should not be the case if we have modified App once as mentioned in the document.
Steps to reproduce:
1) Set up a clean instance of Liferay 7.3
2) Create the Role Change Request Object and forms - Working fine
Followed doc: _https://learn.liferay.com/dxp/7.x/en/developing-applications/developing-low-code-applications/creating-the-role-change-request-object.html_
3) Create the Role Change Request App - facing error for step 6
Followed doc: _https://learn.liferay.com/dxp/7.x/en/developing-applications/developing-low-code-applications/creating-the-role-change-request-app.html_
1) Liferay GA1
2) Liferay 7.3 SP1
Note, Attached gif for the same.
Reproduced on Master, Commit: 4d00a82609556bf429f895945fcd571f5d934e29
If I'm not including the 'Select from List' field or if I include the 'Text' field only then I'm able to proceed further with this functionality without any console errors.