[Zenphobia]

Hi everyone. I am a bit of a noob, so thank you for going easy on me and for helping me.

PROBLEM:

I created a media rich ePub with inDesign following a Lynda.com tutorial and I get:

ERROR: 3-DJiu-Jitsu3.epub/OEBPS/toc.ncx: External DTD entities are not allowed. Remove the DOCTYPE.

ERROR: 3-DJiu-Jitsu3.epub/OEBPS/toc.ncx: External DTD entities are not allowed. Remove the DOCTYPE.

When I remove the DOCTYPE line, I get a ton of errors in the file.

METHOD:

-Created ePub in Design, relatively simple layout with the exception of multiple mp4 files and a fair amount of hyperlinks.
-Exported to ePub 3
-Used pagina EPUB-Checker to validate
-Received above error
-Attempted to remove DOCTYPE line in Sigil. When I do, the file generates a slew of new errors.

Here is the DOCTYPE line from my toc.ncx:

<!DOCTYPE ncx PUBLIC "-//NISO//DTD ncx 2005-1//EN"
"http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">

EXPECTED:

I simply want to get the ePub validated so that I can move on to distribution.

PLATFORM:

Software and such:
Windows
InDesign (latest)
pagina EPUB-Checker
Sigil

ADDITIONAL INFO:

My ePub is too large too attach here, but I can provide a dropbox or a Google Drive invitation if having the file itself would help.