[Satellite 6]'hammer activation-key list' command fails with error "undefined method `products' for nil:NilClass"

Issue

• Hammer CLI fails with products for nil:NilClass error, when listing activation keys.
• Loading error when trying to list Activation Keys page on the Red Hat Satellite 6 webUI.
• Getting below error, while trying to list the activation key using hammer:

[root@satellite]# hammer activation-key list --organization "ACME_Corp"
[Foreman] Password for admin: 
undefined method `products' for nil:NilClass