This issue occurs in 6.2.x only.

Steps to reproduce:

1. Navigate to Control Panel > Web Content

2. Click Manage > Structures

3. Add a structure with a text field

4. Add a web content that uses that structure

5. Click on the pencil icon to edit the structure

6. Click "Save"

7. When the Editing Structure Details frame opens, click "Save"

   • The frame will show "Waiting for an Answer" and an exception will display in the console. Edits made to the structure here will not be saved.