Moving this discussion to the InDesign forum.
You need to install Indesign CC 2014 that has the epub fixed option.
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Moved to InDesign EPUB forum
As already pointed out, you'll need to install CC2014.1. Look in your Creative Cloud desktop app for it and install it.
Note that you must have a operating system that supports it (Mac OSX 10.7 or higher or Windows 7SP1 or higher.)
Thanks Bob I didn't realize we had a specific forum for InDesign ePubs. It makes sense though considering the volume around the topic.