Flatsome 3.9+ is using the new Instagram Graph API to connect to Instagram. To use it, you’ll need an Instagram Business or Creator account. This is a new limitation made by Facebook / Instagram and not by the Flatsome theme.
The theme will connect by an older method with Instagram by default, for backward compatibility reasons. This older method can stop working for anyone at any time due to Instagram restriction, so we highly encourage you to connect your Instagram as explained in this document.
If an error is shown “Instagram has returned invalid data“ this means the theme is trying to connect with the older method and the new method is not setup/connected correctly.
Instagram Business Account
Follow these steps to set up an Instagram Business Account https://www.facebook.com/help/502981923235522
Steps should be performed from a mobile device as some settings are not available from a desktop.