The following line:
WSGIApplicationGroup %{GLOBAL}
Is missing from:
/etc/apache2/conf-available/openstack-dashboard.conf
No idea why it was working for many years without it.
The following line:
WSGIApplication Group %{GLOBAL}
Is missing from:
/etc/apache2/ conf-available/ openstack- dashboard. conf
No idea why it was working for many years without it.