Hi @gerwinverkerk
I hope you’re well today!
This usually means that fields that are already on the form cannot be used for calculations:
– either they are fields that can’t be used like that at all (e.g. fields like e-mail field)
– or they don’t have calculations enabled
Since I don’t know the form, I can only give general response but please start with the following:
– edit the form and check its fields
– open fields that you would like to use in calculation for editing
– switch to their “Calculations” tab and make sure that “calculations” option is enabled
– in case of some types of fields (like “select” or “radio”) you will also need to set values for options.
Take a look, please:
https://app.screencast.com/pTKCLomFCUX3w
Best regards,
Adam
