iam running reaction init on windows 10,64 bit machine. Getting the attached error.
Are you using correct nodejs version? I had the same issue when I started first time with Reaction. Please use Nodejs 8.* version and you can use Nodist or NVM to manage more than one node versions on your machine and remember to add nodejs with the correct path.
Let me know if this solve the issue.
You should use CMD as administrator in order to install packages globally