Installation of Pouta-Blueprints stopped at "network bridge not found"

Dear Developers of Pouta Blueprints,

I'm a developer at NBIS, Sweden and we are interested in applying Pouta-Blueprints at here at the Swedish SNIC cloud. However, when I tried to install the software following the instruction at https://github.com/CSC-IT-Center-for-Science/pouta-blueprints/blob/master/doc/how_to_install_on_cpouta.md.

My installation procedure aborted with the message

TASK: [single_server_with_docker | check or build image] *********************\*
failed: [localhost] => {"changed": true, "failed": true, "image_id": null}
msg: Error: network bridge not found
Log:Step 1 : FROM ubuntu:14.04
---> 43c910d8ff01
Step 2 : MAINTAINER Olli Tourunen "olli.tourunen@csc.fi"
---> Running in 125ef902c21b
---> cadcb033cd68
Removing intermediate container 125ef902c21b
Step 3 : RUN apt-get update
---> Running in 404b74e8adf3

FATAL: all hosts have already failed -- aborting

And the full installation message can be found in the attached file.

Any help is highly appreciated.

Best regards,

Nanjiang
[install_pb.bash.log.txt](https://github.com/CSC-IT-Center-for-Science/pouta-blueprints/files/507958/install_pb.bash.log.txt)