I’m trying to read data from a spreadsheet, like in the youtube tutorial but i’m getting a console error:

 [2020-01-16 15:22:26] Invalid variable name, it must contain at least 1 characters
 [2020-01-16 15:22:26] Running script  
 [2020-01-16 15:22:26] Starting analysis 5e2073cf06fbee0026b7870f

I think that is the spreadsheet format but I do not found anywhere what is the right format for the spreadsheet.

does anyone know where can i find the docs about that analysis example?