[KevinH]

Is sounds like your epub has more than a few issues. Try installing java on your machine then install the epubcheck plugin (available in our Plugin Index). The epubcheck plugin requires java.

Then load your epub in Sigil and run the epubcheck plugin.

It will create a validation window with a list of errors it found and make it easier to both see the error message and navigate to the correct place in your code to find and fix them.

In your file named: "Make it a habit to have more than two options.xhtml" there appear to be errors on lines 17 (on or near column 249), line 21 (on or near column 145) and line 23 (on or near column 6), based on the epubcheck 2.0 output you copied above.

A screen shot of those and surrounding lines might help.

Also naming your file something like "Make it a habit to have more than two options.xhtml" is probably not the smartest decision as files with special characters including spaces may not work properly on all e-readers. Simpler is always better. Maybe use Sigil to rename it to something like chapter01.xhtml or some other appropriate simple file name.