I'm getting the HTTP Request Error in the latest 3.1 version of the plugin when I have any other plugins active. Even Hello Dolly seems to mess with it. With everything disabled there is no error and the content is ok. But any other plugin causes the all of the post URLs to return 404s. With everything deactivated except for MCB it's ok but as soon as any plugin is added all of the posts fail to load and I see the HTTP Request Error on the backend.
Any suggestions on lines that I can try removing to see if it helps in the new version? Line 69 seems to be a blank line in version 3.1