Trying to create a new Hostgroup with the Foreman v0.4. Fresh install on a PostgreSQL DB server.

Everything is working fine except adding a new hostgroup. When I click the button to add one, I receive this error.

Here is a PasteBin of the debug output from the Webrick server.
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http://pastebin.com/AQKAHTcq

Here is the error on the Foreman page.
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undefined method `domain_id' for #<Hostgroup:0x7fddf416de68>
ActionView::TemplateError
undefined method `domain_id' for #
app/helpers/layout_helper.rb:74:in `select_f'
app/helpers/layout_helper.rb:93:in `field'
app/helpers/layout_helper.rb:89:in `field'
app/helpers/layout_helper.rb:87:in `field'
app/helpers/layout_helper.rb:73:in `select_f'
app/views/common/_domain_subnet.html.erb:2
app/views/common/_domain_subnet.html.erb:1
app/views/hostgroups/_form.html.erb:44
app/views/hostgroups/_form.html.erb:1
app/views/hostgroups/new.html.erb:3
/server:3