Not really, those happen if you try to process a registration or login with a used csrf token (csrf tokens are lost if the server restarts, by the way).
@Joykiller there is no issue setting NodeBB up as root. I always do it like that and later chown the installation to another user. Then I start NodeBB over Supervisoe from that non-root user.
Update:
All issues resolved. 😛
Re-setup everything.