Individual display does not work

Hello.
I installed your plugin today. I was using WP Family Tree, which is no longer maintained. I see that your plugin is very similar, but it does not work properly: it is impossible to display the individual files. I get the display of the tree, or the list of members, but when I click on the link of a person, I arrive on a 404 not found page! I specify that I disabled the old WP Family Tree plugin.
Thank you for explaining to me how to display individual informations on a page, or to correct the plugin. I can’t give you a link, because I test locally, and anyway, my family site is private.
I hope to have your answer soon. Best regards.

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