Non-administrator users cannot repeat fields in a web content with a structure with a repeatable field

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2, Master
• Fix Version/s: 7.0.0 DXP FP8, 7.0.0 DXP SP2, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Dynamic Data Mapping, Dynamic Data Mapping > Form Builder
• Labels:
  • QA-AUTOMATION
  • ee-ts
  • fw_test_poshi
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-8-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 4
• Sprint: F&W #29 - Nov 07 - 18
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/44923

Steps to reproduce

1. Create a Web Content Structure
2. Add a text field
3. Configure the text field as repeatable
4. With a non-administrator user with permissions to create web content, try to add a field clicking in the + sign
5. See the following error in the js console:

Failed to load resource: the server responded with a status of 400 (Bad Request)

And the warning in the log:

Reject serveResource for http://localhost:8080/group/control_panel on com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet

Reproduced on master @ 30021504e07312cff9256abddc5e1604294a198e