I had OpenProject working fine, before I have been forced to upgrade it, after issuing an update and upgrade command on Ubuntu 18.04 LTS. Now, when visiting the OpenProject URL, all I see is a blank screen with the word 'Nothing', as seen in the screenshot, below. Can anyone help or do I need to re-install OpenProject? Has the upgrade installed a version other than the CE version?

If I am required to uninstall the OpenProject upgrade, before reinstalling it, do I need to issue the commands similar to the ones listed, below?

# systemctl list-units --type service |grep -iH openproject

# systemctl disable openproject-web-1.service

# systemctl disable openproject-web.service

# systemctl disable openproject-worker-1.service

# systemctl disable openproject-worker.service # systemctl disable openproject.service

# service openproject stop #  rm -rf /opt/openproject # userdel openproject

#  rm -rf /home/openproject

# rm -f /etc/cron.d/openproject-* # rm -f /etc/systemd/system/openproject*

# rm -f /etc/apt/sources.list.d/openproject-ce.list # rm -rf /var/log/openproject

# mysqlmysql> drop database openproject;mysql> quit # rm -rf /etc/openproject    I  am using postgres

# rm -rf /var/db/openproject

# dpkg --purge openproject #  rm -f /var/lib/apt/lists/dl.packager.io_srv_deb_opf_openproject-ce_stable_8_ubuntu_dists_16.04_*

# rm -f /var/cache/apt/archives/openproject_8.2.0-1545059549.9474629b.xenial_amd64.deb