Configure screen to have multiuser support

Following up on https://unix.stackexchange.com/questions/163872/sharing-a-terminal-with-multiple-users-with-screen-or-otherwise Same as the first comment, my screen complains about needing suid root, and sudo chmod u+s /usr/bin/screen fixes that for me. However, when the guest tries to connect to the screen session with screen -x youruser/multisession He's getting: chmod /dev/pts/13: Operation not permitted How to fix for that? The bugs at https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1173312 reported the same issue, yet the conclusion was that it was _"fixed in trusty"_ in 2014. Mine is Ubuntu 22.04.2 LTS, and I'm still having such Operation not permitted issue.