Ensure that you are running the latest version of the Fastly CDN module for Magento 2. See Upgrade the Fastly Module.
Verify the environment configuration for the Fastly service. See Check Fastly caching.
You must have Admin credentials to access the Magento Cloud Staging and Production environments.
List of client IP addresses to include on the allow list
Log in to the Magento Admin UI.
Click Stores > Settings > Configuration > Advanced > System.
Expand Full Page Cache > Fastly Configuration > Edge ACL.
Create the ACL container:
Click Add ACL.
On the ACL Container page, enter a ACL name—
Select Activate after the change to deploy your changes to the version of the Fastly service configuration that you are editing.
Click Upload to attach the ACL to your Fastly service configuration.
Add the list of IP addresses allowed to access the Magento Admin UI:
Click the Settings icon for the
Add and save the IP Value for each client IP address.
Click Cancel to return to the system configuration page.
Click Save Config.
Refresh the cache according to the notification at the top of the page.