Syncing from a single standalone to a subsite instance on a multisite setup

Hello!

Your plugin is incredible. I have tested the following:

1. A single site to another single site – works great!
2. A single site to the root blog of a multisite instance – works great!
3. A single site to a subsite of a multisite instance – this is where I get the error.

The remote website encountered the following error: Unauthorized access (invalid token)

Specifically, I can successfully do all functions from the subsite to the single site, but the error I run into is when I am trying to do an action from the single site to the multisite subsite – that’s the only time the error appears.

Is this typical behavior when trying to access a subsite of a multisite instance? I’m not sure this plugin was made for what I am attempting, but wanted to ask. Thank you!