We adore this skin, however discovered it isn't compatible with 1.34.1 the current release since support ends for 1.33 in June 2020. On clean installation with no extensions enabled (even packaged extensions) enabling this skin kicks a 500 error and renders site inaccessible. You can change it back to Vector in LocalSettings.php. If you changed this in your user prefs and got error 500 and can't access the site, using SSH you can use a maintenance script to change the user settings back to vector: php userOptions.php skin --old "pivot" --new "vector"
We really hope they release an updated version soon but for now we have to transition to a similar one and begin customizing that to replace the skin ~~~~