Field Editing Error
If a field is supported by Structure but cannot be edited for some reason, you will receive an error message. This typically occurs because:
You do not have edit access to the work item, project, or field
The field has not been added to the appropriate screen
The field has been deleted or cannot be found
For more information, speak with your Jira administrator.
Adding a Field to a Screen
In order to edit fields in Structure, those fields must be added to the appropriate screens from your Jira settings.
To add a field to a screen:
Go to Settings | Work Items. (Note: You must have admin access)

In the left menu, select Fields.

Locate the field you want to be able to edit from Structure. Click the … on the far right and select Add field to screen.

Select the “Default Issue Screen” for any project within the structure (or select all screens, if you use this field in multiple structures).

Scroll to the bottom of the list and click Update.