This application need node version 6.14.1. So, If you don't setup. Please install it.
Use nvm. Install nvm
nvm ls-remote
This command show node version. please select node 6.14.1.
nvm install 6.14.1
Please confirm where you installed it.
nvm ls
If you use another node. Please change node version.
nvm use 6.14.1
Set this command to default setting.
nvm use default 6.14.1
yarn instal
or
npm install
yarn run dev
or
npm run dev