Self Signed Cert error

 ng build
Building Angular Package

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Building entry point 'msl'
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Compiling TypeScript sources through ngc
Bundling to FESM2015
Error: self signed certificate in certificate chain
    at TLSSocket.onConnectSecure (_tls_wrap.js:1506:34)
    at TLSSocket.emit (events.js:315:20)
    at TLSSocket._finishInit (_tls_wrap.js:948:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:706:12) {
  code: 'SELF_SIGNED_CERT_IN_CHAIN'
}
Bundling to FESM5
Bundling to UMD
Minifying UMD bundle
Copying declaration files
Writing package metadata
Built msl

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Built Angular Package!
 - from: D:\Source\MNLottery\CC\projects\msl
 - to:   D:\Source\MNLottery\CC\dist\msl
------------------------------------------------------------------------------
Error: self signed certificate in certificate chain
    at TLSSocket.onConnectSecure (_tls_wrap.js:1506:34)
    at TLSSocket.emit (events.js:315:20)
    at TLSSocket._finishInit (_tls_wrap.js:948:8)
    at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:706:12) {
  code: 'SELF_SIGNED_CERT_IN_CHAIN'
}

Npm suggest making sure to run these commands

npm install npm -g --ca=""
npm config set ca=""

Which did not work for this problem..

Whoever allowed (Angular) that error message to omit the offender name should be flogged.

Here's how to find it. Search node_modules folder for .pem files.