Doesn't convert to ENML correctly

[SiddharthMantri]

I've downloaded and customized this to work such that when some html content is posted, an ENML response is generated. However, we get the following error

Element or attribute do not match QName production: QName::=(NCName':')?NCName.

Hunting on StackOverflow, a solution that said 'xmlns:=' was invalid was found. However, I couldn't find any such violation in the converted document. Any suggestions as to what the error could be?

Thanks!