Rancher 2.6 "This page could not be found"

Yesterday the GUI was still working. Today I get the error “This page could not be found”. On two different instances. Help.

sudo docker run -d --privileged --name rancher --restart=unless-stopped -p 80:80 -p 443:443 -e HTTP_PROXY="***" -e HTTPS_PROXY="***" -e NO_PROXY="***" rancher/rancher:v2.6-da2e59c93300619afd634d1d694117901bcf7aa4-head

Without doing anything - it works again! =)