Have a look at this comment: Foreman-1.17RC1 It seems that there was missed build to 1.17. There are links to koji to get updated smart_proxy_dynflow_core packages, that should pull tfm-ror51-rubygem-sinatra-2.0.0-1.el7.centos.noarch and tfm-ror51-rubygem-sqlite3-1.3.13-1.el7.centos.x86_64. Tested on nightlies + centos7 and the service started just fine.
