The Legacy API permission on Instagram was made available only until September 30, 2020. To avert service interference, you may remove the Instagram section in your Debutify account. You may check Instagram Basic Display API for additional information.
Go to your Shopify Admin, select Online Store.
Select your Debutify Shopify theme, and click on Customize.
Tap Theme Settings.
Click on Debutify Add-Ons to view your list of available Add-Ons.
Uncheck the Instagram feed to remove access to the linked Instagram page.
Click Save to apply changes.