Error: spawn webpack ENOENT

[thackerronak]

showing Error: spawn webpack ENOENT when I run the below command
truffle serve
Serving static assets in ./build on port 8080...
Rebuilding...
Running webpack...
events.js:160
throw er; // Unhandled 'error' event
^

Error: spawn webpack ENOENT
at exports._errnoException (util.js:1022:11)
at Process.ChildProcess._handle.onexit (internal/child_process.js:193:32)
at onErrorNT (internal/child_process.js:359:16)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickDomainCallback (internal/process/next_tick.js:122:9)

[jetpack3331]

I have the same error on Windows 10, are u using Windows platform?

[mikenk2010]

You should run npm install again to make sure cross-env is available.