From PeepSo Docs
If you experience issues with trashed pages like this example http://yourdomain.com/slug__trashed/
- Delete the existing page along with the trashed page.
- Empty the trash inside your "pages" in the Dashboard.
- Recreate the page that had the issue (for example profile page)
- Include the PeepSo Shortcode for that page.
That should solve the issue for most cases.
If not, please send us a support ticket so we can investigate it for you.