Describe the bug
Object reference error observed in DocumentImportController.cs.

To Reproduce

• In Copilot API's appsettings.json, set the ContentSafety setting's Enabled property to false
• Launch the application in debugging mode.
• Refresh the copilot UI.
• Navigate to the ContentSafetyStatus method within DocumentImportController.cs.
• Object reference error is thrown on this line: return this._contentSafetyService!.ContentSafetyStatus(this._logger);

Expected behavior
This error has cropped up after changes made around Content Safety. Application should work fine even when ContentSafety setting's Enabled property is set to false. Error is not encountered when ContentSafety setting's Enabled property is set to true

Screenshots

Platform

• OS: Windows
• IDE: Visual Studio
• Language: C#
• Source: main branch of Chat Copilot