portainer: after fresh install, unable to create admin user (and access it using it)

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BUG REPORT INFORMATION

Description

Steps to reproduce the issue:

1. pull latest image
2. start it normally
3. try to access it
4. TRY to create admin user, when I fill in my password and click create user nothing happens, if I try to click again it says user already exists
5. when I try to refresh URL, portainer ask me for username and password: on 1st attempt I get " Your session has expired" and on 2nd I get " Invalid credentials.
6. I tried to remove ./data and restart did not help…

Technical details:

• Portainer version: latest

# docker pull portainer/portainer
Using default tag: latest
latest: Pulling from portainer/portainer
Digest: sha256:8736c3e0fd899229786c8f2198cd3f63fe2815df249b12758f28ef669028057b
Status: Image is up to date for portainer/portainer:latest
# 

• Target Docker version (the host/cluster you manage):

# docker version
Client:
 Version:      17.09.0-ce
 API version:  1.32
 Go version:   go1.8.3
 Git commit:   afdb6d4
 Built:        Tue Sep 26 22:42:09 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.09.0-ce
 API version:  1.32 (minimum version 1.12)
 Go version:   go1.8.3
 Git commit:   afdb6d4
 Built:        Tue Sep 26 22:40:48 2017
 OS/Arch:      linux/amd64
 Experimental: false
# 

• Platform (windows/linux): Linux

# cat /etc/debian_version 
9.2
# cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
# 

• Command used to start Portainer (docker run -p 9000:9000 portainer/portainer):

via docker-compose: (part of compose)

        portainer:
                image: portainer/portainer
                expose:
                        - 9000
                volumes:
                        - "/var/run/docker.sock:/var/run/docker.sock"
                        - "./data/:/data/"

• Target Swarm version (if applicable):

same as host

• Browser:

Mozilla/5.0 (X11; CrOS armv7l 10032.21.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.26 Safari/537.36