I have nextcloud 20.0.2
If I search in the contacts (in the upper right bar), I get a “toast” with the search hits. The url is for example https://server:444/index.php/apps/contacts/direct/bce31234-d811-4f21-b8ad-c8ba71083263~kontakte
If I follow this link, I’m redirected to https://server:444/apps/contacts/Alle%20Kontakte/bce31234-d811-4f21-b8ad-c8ba71083263~kontakte
But this URL does not exist, the “index.php” part is missing.