On 29/01/2025 18.30, Debian Bug Tracking System wrote:
#257676: cannot start screen from a su session It has been closed by Chris Hofstaedtler<z...@debian.org>.
Upstream claims this was fixed in 4.6.1, per https://savannah.gnu.org/bugs/?25214
Indeed, I confirm that the problem non longer exists. Thank you for the updated package! -- Laurent.