Can't find Open World Demo Collection in the project


I am currently running Unreal Engine 4.12.5 and I am trying to add to my project the “Open World Demo Collection”. For some reason, after the process of “Add to Project” has finished, the files that are part of “Open World Demo Collection” are nowhere to be found. Not even in the Content Browser of the Unreal Engine. Could anyone here please tell me what I should do to gain access to this collection?

Yes. I have added this to the project as well but when looking at the content there is nothing called “Open World Demo Collection” I have looked in all the other folders and I can’t find this content.