Problem using Subscriber | WSProxy inside a CloudPage

Question

I'm trying to use this code and I'm facing this error:

<script runat="server">
Platform.Load("core","1");
  var subscriber = {"Status": "Active"};
  var key = '00003';
  try {
  var sub = Subscriber.Init(key);
  } catch (e)
  {
  Write("<br> Fail: " + Stringify(e));
  }

</script>

Error:

Fail: {
  "message":"CreateObject Function is not valid in content. This function is only allowed in non sendable content.\r\n Function: CreateObject(\"Subscriber\")",
  "description":"ExactTarget.OMM.FunctionExecutionException: CreateObject Function is not valid in content. This function is only allowed in non sendable content.\r\n Function: CreateObject(\"Subscriber\")\r\n Error Code: OMM_FUNC_CONTEXT_ERR\r\n - from Jint\r\n\r\n"
}

Also this code:

<script runat="server">
  Platform.Load("core","1.1.1");
    
try {
  </script>
%%[
SET @ll_sub = CreateObject("Subscriber")
SetObjectProperty(@ll_sub, "EmailAddress", "[email protected]")
SetObjectProperty(@ll_sub, "SubscriberKey", "00003")

]%%

<script runat="server">
  Platform.Load("core","1.1.1");
    
  } catch (e) {
  Write("<br> Fail: " + Stringify(e));
  }
  </script> 

Aaand also this one:

<script runat="server">
Platform.Load("core","1.1.5");
try {
var prox = new Script.Util.WSProxy();
var props = ['Id', 'ListName', 'Description'];
var filter = {
    Property: 'ListClassification', 
    SimpleOperator: 'equals',
    Value: 'PublicationList'
};

var result = prox.retrieve('List', props, filter);

  Write(result);
  } catch (e)
  {
  Write("<br> Fail: " + Stringify(e));
  }
  
</script>

I'm getting the same error.

Error:

Fail: {"message":"Exception has been thrown by the target of an invocation.","description":"System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. - from mscorlib --> \r\n\r\n --- inner exception 1---\r\n\r\nExactTarget.OMM.FunctionExecutionException: WSProxy object is not valid in sendable content. This function is only allowed in non-sendable content.\r\n Object: Script.Util.WSProxy()\r\n Error Code: OMM_FUNC_CONTEXT_ERR\r\n - from OMMCommon\r\n\r\n\r\n\r\n"}

Maybe a new release has impacted the use of those functions?

Answer 1

This behavior started occurring in a recent Marketing Cloud release. It occurs when you preview the CloudPage before publishing. It appears that Salesforce has changed the way that CloudPages are interpreted (and now use the same process as email previews). If you publish the page, then this error should not occur and your code will be interpreted correctly.

From Marketing Cloud support on 6/12/2024: "If you are trying to perform a API call from Cloud page then in the preview mode, the amp script function is not evaluated due to which the error in the UI but if you publish the page, then this error should not occur and your code will be interpreted correctly.
Hence , this is an expected behaviour."