Accidental Image DeletionBrowser Info Environment
To fix the problem, I recommend uninstalling the add-on.
- go to the Add Functionality page
Dashboard > Extend concrete5 > Add Functionality
- find the Background Image and Overlay add-on row and click the "Details" button
- click the "Uninstall Package" button
- click the "Uninstall" button
After the add-on is removed, reinstall it. This should allow it to work as expected again.