If Muffin Options are empty after installation or "Save changes" button does not work, it means your server is limited. In this case we recommend to deactivate all plugins first and after that click “Save changes” button under empty Muffin Options panel. But if this won’t help, then please check topics below where we explained what may be limited on server side:
Comments
there is "Save changes" button in the right bottom corner of each options tab and this button is responsible for saving content.
Thanks!
http://forum.muffingroup.com/betheme/discussion/464/betheme-options-page-stops-working-muffin-options-saving
http://forum.muffingroup.com/betheme/discussion/1908/backend-not-funtioning-after-last-update-muffin-options-is-not-loading