Hi, thanks for the answer. I’m gonna let here what I did to run this package. I searched what Julia version was in 2021. It said it was Julia 1.7. Then, using juliaup, I wrote
juliaup add 1.7
then, it installed the Julia 1.7. After this, in the folder that I would use this package I wrote
juliaup override set 1.7
it seems that all the call that I would say julia it would run julia 1.7. After this, in the pkg mode I used
activate .
it will create a manifest.toml and project.toml. Then I added the packages required to run the example code that it’s here
add NonlinearSchrodinger Plots LaTeXStrings IJulia
IJulia to be able to use this version on jupyter notebook. Well, after all of this everything went fine.