Hi,
Due to a change from Microsoft's side, it is unfortunately no longer possible to add a SharePoint intranet page to a Workspace 365 environment. This was previously possible via a web content tile, but this will now give an error stating "sharepoint refused to connect", which is beyond our control.
Following several reports from partners and customers, we investigated and concluded it is no longer possible. This is also confirmed by documentation from Microsoft:
As a result, the support article "Add your SharePoint intranet to Workspace 365" is no longer available on our support portal.
To still have intranet functionalities in your workspace, we encourage you to check out our Hub and its features: