webpack doesnt compile because of missing files

[preddy5]

ERROR in ./app/index.js
Module not found: Error: Cannot resolve module 'history/lib/createHashHistory' in /Users/preddy5/Work/nnet_work/iris2/iris-agent/app
 @ ./app/index.js 48:24-64

ERROR in ./app/components/CommandEdit.js
Module not found: Error: Cannot resolve module 'brace/mode/python' in /Users/preddy5/Work/nnet_work/iris2/iris-agent/app/components
 @ ./app/components/CommandEdit.js 37:0-28

ERROR in ./app/components/CommandEdit.js
Module not found: Error: Cannot resolve module 'brace/theme/github' in /Users/preddy5/Work/nnet_work/iris2/iris-agent/app/components
 @ ./app/components/CommandEdit.js 39:0-29

ERROR in ./app/components/CommandEdit.js
Module not found: Error: Cannot resolve module 'brace' in /Users/preddy5/Work/nnet_work/iris2/iris-agent/app/components
 @ ./app/components/CommandEdit.js 15:13-29
Child html-webpack-plugin for "index.html":
        + 3 hidden modules