I am exhausting a lot time trying to figure out which characters Flow does not accept when using HTML to create a PDF. I have taken the single quotes ( ' ) and made double quotes per @Shane Young video. Also, there are single quotes in the front and back of words, i.e. 'data', but cannot resolve this as well. There are characters that must stay in the documents such as as ( § ).
The following characters are in the document; ( § ), ( ; ), ( ' ), ( " ), ( , ).