Failed to deploy pike freezer-web-ui

This is my first time of posting question in lauchpad. If I missed anything, please let me know. Thanks

I am trying to deployment pike branch freezer-web-ui to my OpenStack cluster, but keep hitting an issue cannot be solved. These are the error messages I got in /var/log/apache2/error.log

[Sun Mar 31 11:47:37.764473 2019] [wsgi:error] [pid 125328:tid 139961066919680] No handlers could be found for logger "disaster_recovery.utils"
[Sun Mar 31 11:47:37.764473 2019] [wsgi:error] [pid 125328:tid 139961066919680] WARNING horizon.exceptions Recoverable error: __init__() got an unexpected keyword argument 'version'

And here are steps I followed to install to freezer web ui

# git clone -b stable/pike https://github.com/openstack/freezer-web-ui
# pip install -e /freezer-web-ui
# cp disaster_recovery/enabled/_5050_freezer.py /usr/share/openstack-dashboard/openstack_dashboard/enabled/
# systemctl restart apache2

my OS is Ubuntu 16.04 LTS. I can see disaster recovery panel shown in OpenStack dashboard, but when I click any one of freezer pages (jobs, actions, sessions, etc), apache2 pops up the error messages in log file.

The issue has blocked my work for the whole weekend. Thanks for the answer in advance