Using the console to deploy a web application packaged as WAR and described as <distributable /> fails on enabling in the server group with the following message:

Failed to disable Webapp-0.1-SNAPSHOT.war.

Unexpected HTTP response: 500

Request
{
"address" => [
("server-group" => "dragon-standalone"),
("deployment" => "Webapp-0.1-SNAPSHOT.war")
],
"operation" => "deploy"
}

Response

Internal Server Error
{
"outcome" => "failed",
"result" => {"server-groups" => [("dragon-standalone" => {"master" => {
"host" => "master",
"response" =>

}})]},
"failure-description" => "Operation failed or was rolled back on all servers.",
"rolled-back" => true
}