Hi @roxics, I’m sorry that was probably frustrating, but thanks for reaching out. We’ll get this fixed!
You probably have a security plugin that has disabled the REST API on your site, and Print My Blog has silently had an error.
I’m working on a new version that should help with these situations (rather spinning, which I admit implies it’s doing something.)
If you happen to be using Wordfence, just last week I made a short video showing how to enable the needed part of the REST API: https://drive.google.com/file/d/1K3-2BjNSWQBUi1uPxq_l2gCj4xXZ44MD/view
If you’re not using Wordfence, please tell me your site’s URL or what other security plugin you’re using.