If you are logged in as a user using “su” or “sudo su” and attempt to use screen, you’ll get the error message “Cannot open your terminal ‘/dev/pts/0’ – please check”. This post shows how to fix this.
Log out of the terminal/SSH session and log back in as the user you want to run screen as instead of using su.
script /dev/null screen
This worked for me on Debian 7.8 Wheezy.