last update of tableau it didn't work?
i tried it several times in the last update to make Stacked Area Chart in tableau and it make it separated not in one chart Chart
thanks for reaching out and sorry to hear you're experiencing difficulties. Can you please share which version of Tableau you're currently using and it'd be great if you can provide a screenshot of your Tableau working area, when you're trying to create the stacked area chart.
Thanks in advance!