Windows 10:

validate.js writes a preload file to open ip file with single '\' path separator,
_const ip = fs.readFileSync('C:\Users\sukhw\AppData\Local\Temp\ch-10-labs-123GQBJ\ip', {encoding: 'utf8'})
_
but it doesn't work on windows, it give error 'cant open file 'C:UserssukhwAppDataLocalTempch-10-labs-123GQBJip'
So I had to change validate to use '\' as path separator, the it writes preload file as below and works fine
const ip = fs.readFileSync('C:\Users\sukhw\AppData\Local\Temp\ch-10-labs-123GQBJ\ip', {encoding: 'utf8'})
and it works fine