Full Factorial Design Failure in Shiny App with Spaces in 'FACTOR' Column Entries

[DidierMurilloF]

I've noticed a consistent issue regarding the generation of full factorial designs in the Shiny application. When entries in the 'FACTOR' column contain spaces (e.g., 'No nitrogen'), the app fails to create the factorial design. Currently, the workaround involves removing or replacing spaces in these entries, such as changing 'No nitrogen' to 'No-nitrogen'. The app should work seamlessly regardless of whether the 'FACTOR' column entries contain spaces or not.