I just downloaded the code as ZIP file and opened the "deck.gl-masterexampleswebsiteplot" folder in a command prompt then tried the following
npm install
npm start
that plot example didn't run and gave the below error

just try to run the plot example code
"d3-scale": "^1.0.6",
"deck.gl": "^6.2.0",
"luma.gl": "^6.4.2",
"react": "^16.3.0",
"react-dom": "^16.3.0"
Are you running the example from 6.4-release? Master is the dev branch.
I downloaded from Master branch only.
Could you please suggest me which branch should I use?
@mk48 I think @Pessimistress suggested using the branch called 6.4-release. Does it solve the issue?
@mk48 See http://deck.gl/#/documentation/getting-started/installation for how to run examples.
Thanks @IgorWilbert , 6.4-release examples working fine