Javascript error prevents Paragraph field editor from showing controls

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X
• Fix Version/s: 7.1.X
• Component/s: Forms
• Labels:
  • QA-FT
  • ee-ts
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 4

Steps to reproduce

1. Go to Forms
2. Create a new Form
3. Add a new Paragraph Field
4. Click in it to edit
5. Click in the field Body Text

Expected result

• Alloy Editor controls are available

Actual result

• Alloy Editor controls are not available
• Javascript errors are shown in the browser console:

Uncaught TypeError: Cannot read property 'apply' of undefined
    at oop.js:403
    at component._onFocus (:17180/o/frontend-editor-alloyeditor-web/js/alloyeditor.js?browserId=other&minifierType=&languageId=en_US&b=7102&t=1563439685517:379)
    at a.k (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:10)
    at a.<anonymous> (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:11)
    at a.window.CKEDITOR.window.CKEDITOR.dom.CKEDITOR.editor.CKEDITOR.editor.fire (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:13)
    at CKEDITOR.focusManager.focus (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:225)
    at CKEDITOR.focusManager.focus (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:226)
    at h.k (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:10)
    at h.fire (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:11)
    at HTMLDivElement.<anonymous> (:17180/o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=other&languageId=en_US&b=7102&t=1563439685276:57)