Cannot start a PayPal subscription

[avi_vas]

I created a subscription plan:

After clicking Copy Code, I pasted it in my HTML page:

<div id="paypal-button-container-P-855600647D495860NMXSO6MA"></div>
<script src="https://www.paypal.com/sdk/js?client-id=sb&vault=true&intent=subscription" data-sdk-integration-source="button-factory"></script>
<script>
  paypal.Buttons({
    style: {
      shape: 'pill',
      color: 'white',
      layout: 'vertical',
      label: 'subscribe'
    },
    createSubscription: function(data, actions) {
      return actions.subscription.create({
        /* Creates the subscription */
        plan_id: 'P-855600647D495860NMXSO6MA'
      });
    },
    onApprove: function(data, actions) {
      alert(data.subscriptionID); // You can add optional success message for the subscriber here
    }
  }).render('#paypal-button-container-P-855600647D495860NMXSO6MA'); // Renders the PayPal button
</script>

When I click "PayPal Subscribe", I get the following error in the console:

Uncaught Error: Create Subscription Api response error:

{
    "name": "RESOURCE_NOT_FOUND",
    "message": "The specified resource does not exist.",
    "debug_id": "f709778651899",
    "details": [
        {
            "issue": "INVALID_RESOURCE_ID",
            "description": "Requested resource ID was not found."
        }
    ],
    "links": [
        {
            "href": "https://developer.paypal.com/docs/api/v1/billing/subscriptions#RESOURCE_NOT_FOUND",
            "rel": "information_link",
            "method": "GET"
        }
    ]
}

 I get this error whether or not sandbox mode is enabled