Hi

Thanks for contacting us, SP Page Builder, which includes the User Profile SP Author Archive functionality, is compatible with Joomla 5. You can check it. But make sure you have a full site backup before making any changes.

-Regards.

I have an additional question: why doesn't the author of the article, visible below the article, use the photo added in your SP Author add-on?

In the article options, the author is set to have an active link to the author's profile, which means it's not linked to the SP Author profile.

Sample article: https://www.naszgs.pl/aktualnosci/wazne-sprawy/stop-biletom-zerowym-w-siedlcach

author: https://www.naszgs.pl/dziennikarze-autorzy/ewa-k-o