When I try to start up Unity Tweak Tool in 14.04, it throws up a window that says:

"The following schema is missing:


In order to work properly, Unity Tweak Tool recommends you install the necessary packages."

I have no removed this package, I only turned them off in the Privacy settings. However, looking in Synaptic doesn't show these to even try to reinstall them.

I have no idea why these would be missing. Any help would be greatly appreciated.


I removed a package I don't remember and this problem occurred to me too. To reinstall this webapp I tried this:

sudo apt-get install unity-webapps-common

and it resolved the issue.

  • 1
    Turns out, uninstalling the Amazon app actually uninstalls this. Hm, who knew? Thanks for catching this. – CodeMouse92 Feb 18 '16 at 3:53

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