500 error when creating action in rule ''Create linked drupal user account''
We got this working using this rule:

{ "rules_friends_tag_account_create" : {
"LABEL" : "Self Create User Account and login",
"PLUGIN" : "reaction rule",
"OWNER" : "rules",
"TAGS" : [ "CiviCRM", "CiviCRM User" ],
"REQUIRES" : [ "rules", "civicrm" ],
"ON" : { "civicrm_entity_tag_create" : [] },
"IF" : [ { "data_is" : { "data" : [ "civicrm-entity-tag:tag-id" ], "value" : "163" } }
],
"DO" : [ { "civicrm_entity_action_load_create_user" : {
"USING" : {
"civicrm_contact" : [ "civicrm-entity-tag:entity-id-contact" ],
"is_active" : "1",
"notify" : "1" 
},
"PROVIDE" : { "civicrm_user" : { "civicrm_user" : "Created or Loaded Drupal User" } }
}
}
]
}
}