Trouble reproducing tutorial on README.md. Using Windows 10, RStudio.

[Falnesio]

Thanks for this software!

I have been following the step by step on a .xls dataframe (2 col and 720 rows) I have.

Everything was fine until output gave me an error.

output <- simplex(dat,
                  lib = lib, pred = lib,
                  E = 1:10)
Error in model$set_time(time) : 
  Not compatible with requested type: [type=list; target=double].

What could it be? Thanks in advance.