File was linked to a constituent record through the Media tab.
- Linked document was moved
- A firewall is blocking access to the linked file
If the linked file was moved to a new location, manually move it back to the original location
If multiple documents have been moved to new location or server:
Download and run Update Linked Media plug-in
If the linked file was not moved, consult with your IT professional or firewall vendor to adjust the firewall settings.