We can no longer share a dashboard with users from our own workspace. I received the message: "This dashboard contains Power BI Pro content. Only users that have Power BI Pro will have access to it"...
I raised a ticket with Microsoft and they asked us to go ahead and try sharing the dashboard and see if the users can view it. We did that and it worked fine. The person sharing the dashboard still gets the error message but the sharing functionality works. They are working on resolving the inaccurate error message appearing.