Could you please share your workbook, .twbx?
It will be really helpful to support you
Lénaïc RIÉDINGER, Global Community Engineer Tableau
If you see a Helpful or Correct response, please mark it thanks to the buttons below the targeted post!
Forecasting isn't currently compatible with table calculations:
so your best solution would be to remake the view in a way that doesn't use them.
You can also add your vote to this community idea: https://community.tableau.com/ideas/2682