I believe that I’m having the same problem. I installed your plugin yesterday. After setting up a feed and generating the feed, it indicates it’s ‘processing 0%’ for hours and never completes the feed. When I view the feed file, it contains only the firste row of labels (id, name, etc).
WP Cron is enabled, PHP version is okay (7.2), and the product feed directory is writable…all three checks are true. I have deactivated any programs the would have a firewall, caching, etc.
Thanks in advance for your help.