Use #send to access private method

app/views/foreman_passwordstate/_passwords_tab_pane_content.html.erb

 <h2>Managed passwords</h2>
 <%-
-all_passwords = @host.passwordstate_passwords
+all_passwords = @host.send :passwordstate_passwords
 
 groups = all_passwords.group_by { |p| p.password_list_id.to_i }
 groups.each do |id, passwords|