Problem with yarn

Christophe GATELET

Mar 20

Hi

I have a problem when I launch yarn.

https://codeshare.io/5Olo7g

I follow this video https://www.youtube.com/watch?v=Uj5vvTUU3Sc&t=2s

Someone can help me please ?

Thanks

Answered by Christophe GATELET! Go to answer.