Errors and layout issues

I can’t submit articles for approval because I’m getting publishing errors like this:

[body] => {“errors”:[{“code”:”INVALID_DOCUMENT”,”keyPath”:[“root”,”components”,”[6]”,”text”],”message”:”\”text\” was \”\\\”\\\”\” should be not (null or an empty string)”},{“code”:”INVALID_DOCUMENT”,”keyPath”:[“root”,”components”,”[6]”],”message”:”no components defined for role=body”},{“code”:”INVALID_DOCUMENT”,”keyPath”:[“root”,”components”,”[8]”,”text”],”message”:”\”text\” was \”\\\”\\\”\” should be not (null or an empty string)”},{“code”:”INVALID_DOCUMENT”,”keyPath”:[“root”,”components”,”[8]”],”message”:”no components defined for role=body”}]}

Also have layout issues where the Post’s Title is being placed above the Feature Image (Cover) and titles are truncated rather than wrapping in the draft list view in Apple Publisher.
I have yet to work out which file to edit to change the how the json file is sent nor how to introduce additional style rules for h3 tags etc??

https://wordpress.org/plugins/publish-to-apple-news/