Single-user mode signup not working

[dmitrizagidulin]

Checked out a fresh copy, started LDNode with --create-admin to sign up in Single-User Mode:
DEBUG="*" node bin/ldnode.js --webid --port 8443 --cert ../localhost.cert --key ../localhost.key -v --proxy "/proxy" --create-admin

Visited https://localhost:8443/ in the browser, got:

Error: ENOENT: no such file or directory, stat '/static/signup.html'
   at Error (native) 

In the node console:

  ldnode:idp Account on localhost is not available / +15s
Error: ENOENT: no such file or directory, stat '/static/signup.html'
    at Error (native)