I am afflicted by this bug: [Bug]: Self-signed cert rejected · Issue #8737 · nextcloud/desktop · GitHub
It seems I have to turn of HSTS headers, but I don’t see a way.
Hi Huckle,
Welcome on board!
It looks like there’s a bug in the newest Nextcloud desktop client. I recommend downgrading to version 3.16.6 and disabling automatic updates until the Nextcloud team fixes the issue.