Paypal API subscription curl sandbox catalog products Authorization failed due to insufficient permissions - api

Question

This question is about paypal API catalog when try to create a production and to do a subscription.
I'm following this tutorial https://developer.paypal.com/docs/subscriptions/integrate/
I'm able to get my token, but trying to create a product I get "Authorization failed due to insufficient permissions"
Here my code
// GET TOKEN
$paypalcurl = 'curl -v https://api-m.sandbox.paypal.com/v1/oauth2/token -H "Accept: application/json" -H "Accept-Language: en_US" -u "'.($paypal_client_id.':'.$paypal_client_secret).'" -d "grant_type=client_credentials"';
$ptoken_result = json_decode(exec($paypalcurl.' 2>&1'),true);
$ptoken = $ptoken_result['access_token'];
// CREATE PRODUCTI AND GET PRODUCT ID
$paypalcurl_create_prodct = 'curl -v -X POST https://api-m.sandbox.paypal.com/v1/catalogs/products \
-H "Content-Type: application/json" \
-H "Authorization: Bearer '.$ptoken.'" \
-d \'{
"name": "Video Streaming Service test",
"description": "Video streaming service",
"type": "SERVICE",
"category": "SOFTWARE",
"home_url": "https://www.example.com/"
}\'';
$pcreate_result = json_decode(exec($paypalcurl_create_prodct.' 2>&1'),true);
if ( ADMIN_PASS == 1 ) { echo str_replace(',',',<br>',var_export($pcreate_result,true)); }
Here the result
array ( 'name' => 'NOT_AUTHORIZED',
'message' => 'Authorization failed due to insufficient permissions.',
'debug_id' => 'f7d1051f9daf3',
'details' => array ( 0 => array ( 'issue' => 'PERMISSION_DENIED',
'description' => 'You do not have permission to access or perform operations on this resource.',
),
),
'links' => array ( 0 => array ( 'href' => 'https://developer.paypal.com/docs/api/v1/billing/subscriptions#NOT_AUTHORIZED',
'rel' => 'information_link',
'method' => 'GET',
),
),
)
What I'm I missing ?

Answer 1

After the comment I realize that it was simply a delay.
1- go to https://developer.paypal.com/developer/applications/
2- click on the app you created
3- there is a checkmark Accept paymentsEnable one-time and subscription payments. Advanced options and CLICK on "Advanced options"
4- checkmark "Billing agreements" and "Future payments" and save
5- wait some hours
6- voilà!