yarn : ERROR: There are no scenarios; must have at least one. On Ubuntu – Seobytes

Issue: The following error is displayed when running yarn in the same directory as the package.jsnon file:

00h00m00s 0/0: : ERROR: There are no scenarios; must have at least one.

Solution:

this is the wrong yarn, ubuntu install cmdtest.

Run:

sudo apt remove cmdtest

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add - echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list 
sudo apt update 
sudo apt install yarn