Hello John,
Are you able to upload an image via the normal media library upload process? If you are unable to, there may be a file permission issue. That would need to be resolved in order to perform the image upload.
Please provide the URL for the Target. And we would like to review the log file. Here is how to create it.
On Target edit the wp-config.php file and add the following just above the /* That’s all, stop editing! Happy blogging. */
define(‘WP_DEBUG’, true);
define(‘WP_DEBUG_LOG’, true);
You may already have a define(‘WP_DEBUG’, false); or true, please make sure you only have one. This will start the log file.
On the Source click on the “Push to Target” button
Back on the Target machine locate the wp-content/plugins/wpsitesynccontent/~log.txt file and download that via FTP and send that to us at https://serverpress.com/contact.