How to reproduce: 

1) Login into console
2) Navigate to Profile -> PicketLink -> Federation
3) Unknown Error 

Unknown error

Unexpected HTTP response: 500

Request
{
    "operation" => "read-resource-description",
    "address" => [
        ("subsystem" => "picketlink"),
        "federation",
        ("federation" => "*"),
        ("identity-provider" => "*")
    ]
}

Response

Internal Server Error
{
    "outcome" => "failed",
    "failure-description" => "JBAS014883: No resource definition is registered for address [
    (\"subsystem\" => \"picketlink\"),
    (\"federation\" => \"*\"),
    (\"identity-provider\" => \"*\")
]",
    "rolled-back" => true
}