Wrong 302, can’t access any posts

Hello,

currently we can’t access any posts. The links are correct, but when clicking (or sending a curl), we get a 302 response, redirecting to the homepage with appended ?redirect_to=.

This seems to have appeared out of the blue.

– Permalinks are set to pretty, posts have %category%/%postname%
– uses static homepage
– Polylang is set to hide language for default, tried deactivating “detect browser language” without success
– tried various different settings without success. Searched for this and found no other topic
– is definitely coming from Polylang, no other Plugin/Theme interferes

Any ideas?

The page I need help with: [log in to see the link]