User unable to post to WordPress

[Piyopiyo-Kitsune]

User reported in 1614639-zen that they have trouble publishing their posts to WordPress.com. I've noticed on the add-on page that most recent reviews are complaining about the same errors of not being able to post to WordPress.com.

##Steps they take
While in Google Docs they go to Add ons -> Publish to Wordpress.

##Expected result
Their post publishes on their WordPress.com site

##What actually happens
They receive two types of errors:

1. TypeError. Cannot read property 1 from null
2. We're sorry, a server error occurred. Please wait a bit and try again.

##Troubleshooting they have tried:

1. Disconnecting their blog and reconnecting it
2. Reinstalling the add on
3. Testing a different document with success, while another fails