When you try to expand a group in the Permissions matrix report, the following error is shown:

You can't expand a Microsoft 365 security group without consenting to the Azure ShareGate app. Please consent to the app and try again.

To expand your Security groups, ShareGate Migrate must use a SharePoint API that requires the app to be consented to in your tenant.

To resolve this error, a global admin must grant the app consent.

To learn more, see How a global or privileged role admin can consent to ShareGate's Microsoft 365 permission sets.