Webpack Error when hosting an application on local machine

I have got an application code from git repository : https://github.com/drminnaar/noteworx-react-mongodb
so as mentioned in the steps to locally host this application on my machine. I tried npm run build command. This is mentioned in READ.md file in the repo

But when giving the command npm run build I am facing the error below

PS C:Usersakashnoteworx-react-mongodb> npm run build
> [email protected] build 
> webpack -d
[webpack-cli] Error: Option '-d, --devtool <value>' argument missing 
[webpack-cli] Run 'webpack --help' to see available commands and options 
PS C:Usersakashnoteworx-react-mongodb> 

I am not sure how to proceed further. could any one of you please help on this issue.