Reproduced and confirmed this was caused by 2 reasons
1- apache2 doesn't enable mod_headers by default now, so we need to explicitly enable it on puppetmaster-passenger.postinst
2- Rack directory changed from /usr/share/puppet/rack/puppetmasterd to /etc/puppet/rack/public/ on the config file, we need to revert this on puppetmaster-passenger.postinst
Reproduced and confirmed this was caused by 2 reasons
1- apache2 doesn't enable mod_headers by default now, so we need to explicitly enable it on puppetmaster- passenger. postinst puppet/ rack/puppetmast erd to /etc/puppet/ rack/public/ on the config file, we need to revert this on puppetmaster- passenger. postinst
2- Rack directory changed from /usr/share/