W3 Total Cache: Default settings are in use. The configuration file could not be

Very strange. You might be better off just managing the settings manually.

i have the same issue, even if i click on the “save the settings” it wont do anything. It will show a page that says “Are you sure you want to do that?” and a “try again” button.

So have I. The same problem

Hi – I’m just putting this in after my webhost’s tech support people found a solution. Try going into Import/Export and restoring default settings. That did it for my site. Good luck!