On Red Hat Satellite v6, katello-installer command fails with error "Foreman_smartproxy[satellite.example.com]: Could not evaluate: 500 Internal Server Error"

Issue

• The katello-installer command as follow:

[root@satellite ~]# katello-installer --katello-proxy-url=http://my-proxy --katello-proxy-port=3128 
 /Stage[main]/Foreman_proxy::Register/Foreman_smartproxy[satellite.example.com]: Could not evaluate: 500 Internal Server Error
Installing             Done                                               [100%] [..................................................................................................................]
  Something went wrong! Check the log for ERROR-level output
  The full log is at /var/log/katello-installer/katello-installer.log

Below error message in katello-installer.log

[ INFO 2014-09-11 14:39:14 main] E, [2014-09-11T14:39:14.185964 #25126] ERROR -- : 500 Internal Server Error
[ INFO 2014-09-11 14:39:14 main] {
[ INFO 2014-09-11 14:39:14 main]     "error"ESC[0;37m => ESC[0m{
[ INFO 2014-09-11 14:39:14 main]         "message"ESC[0;37m => ESC[0mESC[0;33m"wrong number of arguments (2 for 1)"ESC[0m
[ INFO 2014-09-11 14:39:14 main]     }
[ INFO 2014-09-11 14:39:14 main] }
[ERROR 2014-09-11 14:39:14 main]  /Stage[main]/Foreman_proxy::Register/Foreman_smartproxy[satellite.example.com]: Could not evaluate: 500 Internal Server Error