Exactly what postinst installes when wou install server:
<div><div> if ! [ -f /etc/sudoers.d/repetierserver-perms ] || ! grep -q "/usr/local/Repetier-Server/bin/installKlipper" /etc/sudoers.d/repetierserver-perms; then</div><div> echo "repetierserver ALL=NOPASSWD: /usr/local/Repetier-Server/bin/installKlipper" >>/etc/sudoers.d/repetierserver-perms</div><div> echo "repetierserver ALL=NOPASSWD: /usr/local/Repetier-Server/bin/uninstallKlipper" >>/etc/sudoers.d/repetierserver-perms</div><div> echo "repetierserver ALL=NOPASSWD: /usr/local/Repetier-Server/bin/restartKlipper" >>/etc/sudoers.d/repetierserver-perms</div><div> fi</div></div>
Do you also have restartKlipper added?
How did you install the webcam stuff you refer to? Image should have it already installed, so that should not cause this file to loose some lines.