Unity Tweak Tool Error – Fix Missing com.canonical.unity.webapps Schema

14.04unity-tweak-tool

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com.canonical.unity.webapps
In order to work properly, Unity Tweak Tool recommends you install the necessary packages

Install the package unity-webapps-service

the following solution worked with me:

sudo aptitude install unity-tweak-tool

This will fix the broken packages and unsolved dependencies. Good luck!

I had the same issue, and I used the above solutions. Both were required to achieve a solution.

sudo apt-get install notify-osd
sudo apt-get install overlay-scrollbar

Now it works perfectly.