Hello 34503895.
I’ve tested with theme twenty-ten, a very old theme and it works. I works also with the newest WordPress themes. To track your problem some questions again:
1. Is it possible to access your site, could you provide temporary access to the administration panel?
2. Did you do the tests with the built-in templates? You should also deactivate all other plugins you’re using. This is vital, without these tests I cannot track your problem.
3. Do you have authors defined? The plugin does not use the WordPress users, so if all you wish is to display your WordPress users you have to use another plugin. Tessa Authorship provides WP-user independent authorship!!!! That’s what it’s all about.
4. Did you try to test different plugin settings like activating multiple thumbnail support, usage of css and social icon font or built-in icons?
5. Are you able to attach authors to content like pages and posts and the other way arround: posts and pages to authors?
If you can provide a test account and admin access to your website asked for in 1 you can obviate the questions 2 to 5, if not you have to answer the questions 2 to 5. To provide a user and a password you can use the contact form on my website. https://www.takebarcelona.com
Regards.
uh