SharePoint 2013 eDiscovery: Error adding My Site Host as a new Source

When trying to add your My Site Host as a new Source to use for eDiscovery in SharePoint 2013, you receive the following error:

A colleague of mine, Judy Lancaster, found the solution.

1) Go to the Site Settings of your My Site Host.
2) Under the Search section, select Search and offline availability.
3) Select Yes to Allow this site to appear in search results?.

Should be able to add it as a new Source now.