Try this: Go to the Creative Cloud app (menu bar on the Macintosh, task bar in Windows). Click the "gear" icon > Preferences > General > Sign Out. Then Sign In again with your Adobe ID.
It did not work. upon further trouble shooting I have a video placed in the document when i remove it, it uploads and publishes fine when I add it is when I get the error message. Why won't it upload video?
What kind of video have you placed in InDesign? MP4 with H264 encoding is the best of EPUB and Publish Online.
In general, you should be able to use the EPUB Interactivity Preview panel (Window > Interactive submenu) to preview your pages. See if the video previews there.