Error When You Delete Sharepoint Online. One option is to create the folders and move the items to that folders then try deleting the items. For SharePoint 2010 see Restore a deleted object from a SharePoint Recycle Bin.
This is how Preservation hold works to prevent data loss. Make sure you do this before you delete the hub site. We can utilize the same functionality also to delete the content based on its age.
Their profile still appears which may cause confusion when people view the people picker.
The error message referenced Sites that have subsites or certain apps cant be deleted. Unfortunately there is no option to override the list threshold in Office 365SharePoint Online. To resolve this issue delete the SharePoint Online list or library from Outlook and then reestablish the connection to Outlook. We would suggest you try using PowerShell script to delete your sites.