Steps to resolve
Login to the Azure portal and click on Azure Active Directory.
Select the Mobility (MDM and MAM)
Double click on Microsoft Intune.
Change the Scope to None for both MDM and MAM. Then hit Save.
Once saved, try again to enrol the device and it should let you add the device to Azure Active Directory. In some cases, the administrators may need to restart the device and try again.
Please note you would need to have an appropriate Azure AD license assigned to the account with which you are trying to add the device to Azure.
We hope, you will find this information useful. Please let us know your feedback on the comment section below.