Errors During Gulp Start in Organization Chart Tree

[RamprasanthRajendran]

1.Serve JSON was not in the correct format so changed that to
Sol : [https://Your-Sharepoint-Site/_layouts/4/workbench.aspx
2.Browsers list : caniuse-lite is outdated.
Sol : npm install browserslist --save-dev
npm cache clean --force
npm install caniuse-lite@latest --save-dev
3. a SSL certificate isn't provided and Gulp initialization.
Sol : gulp trust-dev-cert