I have tested this quite extensively. I've added an Artist, I've added an album all successfully, When I go to add a new song to the album, The upload runs and when reaching 100%, and the page goes to refresh, I'm receiving the following error:

Note: Returning to the Home page all works well, but when ever I click on a link to navigate to either the album or, the song the error appears. Once the song is deleted, navigation all resumes normally

ERROR:

500 - JHtmlBehavior::mootools not found.
You may not be able to visit this page because of:

an out-of-date bookmark/favourite
a search engine that has an out-of-date listing for this site
a mistyped address
you have no access to this page
The requested resource was not found.
An error has occurred while processing your request.
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Home Page
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JHtmlBehavior::mootools not found.