{"errors":"The api_client does not have the required permission(s)."}

[guyy]

recently we have a case where we made fulfillment into orders.
1、Firstly, we call the interface to obtain permissions
【POST】URL:https://rockbros-eu.myshopify.com/admin/request_granular_access_scopes.json
postData:{"requested_scopes":["read_merchant_managed_fulfillment_orders","read_third_party_fulfillment_orders","read_assigned_fulfillment_orders","write_merchant_managed_fulfillment_orders","write_third_party_fulfillment_orders","write_assigned_fulfillment_orders"]}
[Header]{Content-Type=application/json, X-Shopify-Access-Token=80****d1}

【response】
{"access_scopes":[{"handle":"read_products"},{"handle":"read_customers"},{"handle":"write_orders"},{"handle":"write_inventory"},{"handle":"write_fulfillments"},{"handle":"read_merchant_managed_fulfillment_orders"},{"handle":"read_third_party_fulfillment_orders"},{"handle":"read_assigned_fulfillment_orders"},{"handle":"write_merchant_managed_fulfillment_orders"},{"handle":"write_third_party_fulfillment_orders"},{"handle":"write_assigned_fulfillment_orders"},{"handle":"read_orders"},{"handle":"read_inventory"},{"handle":"read_fulfillments"}]}

2、We get fulfillment_orders success
【GET】https://rockbros-eu.myshopify.com/admin/api/2023-07/orders/5743773516121/fulfillment_orders.json
[Header]{X-Shopify-Access-Token=809****9d1, Content-Type=application/json}

【response】
{"fulfillment_orders":[{****************,"merchant_requests":[]}]}

3、However, after a period of time, we still receive an error message（{"errors":"The api_client does not have the required permission(s)."}）. May I ask why the corresponding permissions were lost

【GET】https://rockbros-eu.myshopify.com/admin/api/2023-07/orders/5743502590297/fulfillment_orders.json
[Header]{X-Shopify-Access-Token=****1, Content-Type=application/json}

{"errors":"The api_client does not have the required permission(s)."}