No item with the ID could be found, Exception: You do not have access to perform that action. (line 191, file "Code")

I've tried deleting the site, re-adding it, disconnecting and reconnecting the Wordpress.com for Google Docs, all the usual ninety steps. It's once again broken. This is the second time in a just over a month -- if this actually stayed connected, it'd be worth it but this is getting ridiculous.
From the Add On I get "Error. Exception: No item with the given ID could be found. Possibly because you have not edited this item or you do not have permission to access it.:"
It won't stay authorized to Wordpress.com, and trying to log in to the site gives: Exception: You do not have access to perform that action. Please ask the owner of this item to grant access to you. (line 191, file "Code")
Keep in mind this should be putting posts into Wordpress not using blocks, and having authors etc would also be nice. But I'm struggling to even get this to remain connected for more than a month at a time.

Start by reproducing the Google Docs add-on authorization and WordPress login failure, then inspect the reported error at line 191 of Code. Verify that reconnecting remains authorized and that publishing posts to WordPress works without the reported access errors.

Written by the indexing model from the issue text.