running into the same currently. first reboot after some updates yesterday (of which one killed klipperscreen), now rebooting into "cannot connect". I can ping the pi, ssh into it and see that somethings running on 80
it's only a partial soltuion to get klipper back running. what's missing afterwards are python libraries for stuff like shaper tuning. you can have a look in #ratos-development for more details
There's currently a fix in moonraker for this issue (ie. update moonraker first, then klipperscreen), but there'll be another fix later. It should be safe to update klipperscreen now as long as moonraker is updated first.