Cannot create/edit Web Content Templates

• Type: Regression Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 7.0.0 M7
• Fix Version/s: 7.0.0 M7
• Component/s: Dynamic Data Mapping, Dynamic Data Mapping > Template Editor, WCM > Web Content Administration
• Labels: None
• Story Points: 3
• Fix Priority: 5

Steps to reproduce:

1. Go to Web Content > Manage Templates
2. Click the Add button

Current behavior:
Nothing happens. The Javascript console shows this error:

http://localhost:8080/group/control_panel/manage?p_p_auth=LfPLGTZG&p_p_id=c...b_portlet_DynamicDataMappingPortlet_type=display&p_p_ajax=0&p_p_isolated=1 414 

(Request-URI Too Long)

Expected behavior:
The edit template view is displayed.