What do i need to do for gulp serve to work? On Windows 7 64 bit gulp serve raises error in module.js:549

Question

So this below is the output from running gulp serve - what do I need to do to get it running?

M:\>gulp serve
module.js:549
    throw err;
    ^

Error: Cannot find module '@microsoft/sp-build-web'
    at Function.Module._resolveFilename (module.js:547:15)
    at Function.Module._load (module.js:474:25)
    at Module.require (module.js:596:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (M:\gulpfile.js:4:15)
    at Module._compile (module.js:652:30)
    at Object.Module._extensions..js (module.js:663:10)
    at Module.load (module.js:565:32)
    at tryModuleLoad (module.js:505:12)
    at Function.Module._load (module.js:497:3)

Answer 1

To make SPFx work with proxy, you should correctly setup proxy settings in nodejs. This is a good and short article on how to do that. Basically you should set your proxy via below code:

npm config set proxy http://proxy.company.com:8080
npm config set https-proxy http://proxy.company.com:8080

However even in that case, it might not work as expected. The most common reason is issues with certificates. What you can do, is to disable certificates check by nodejs. That's not very secure, but if you need it only for SPFx development, that's fine. Run in your console:

set NODE_TLS_REJECT_UNAUTHORIZED=0

Then install SPFx with yeoman from scratch and check if gulp serve works.