Hey all!
I'm trying to move my data source for my canvas app to Dataverse from a Sharepoint List (I'm going to be setting up a model-driven app for administration/review of the submitted data). I've built my table and columns, etc. When I added it as a data source and slowly going through screen by screen and updating, I'm having problems with my cascading forms (across multiple screens) storing the information in the variable that was previously working with my sharepoint list:
Form1: Datasource is MS Dataverse Table--S2S_1
On Success: Set(formType,"Edit");
Set(selectedItem,'Form1'.LastSubmit);
Navigate('Screen2')
DefaultMode: If(formType = "New", FormMode.New, FormMode.Edit)
Item: selectedItem
The only two datacards in that specific form are two text boxes that I specified in the table. Powerapps is throwing this error:

Google hasn't been super helpful on what this error means so I can fix the thing. From everything I've found, it *shouldn't* have an issue with the variable, and yet.....it is. I have this formula setup on each of my Form screens (there's 4 screens), and works fine with the Sharepoint List, but as soon as I switched it to my CDS table, it blows up on the variable. Any help would be appreciated--sorry I'm a novice with dataverse and still learning!