Generating your NFT collection

Greeting
-I have follow the step given on the https://github.com/ashbeech/moralis-mutants-nft-engine#dependencies-
-I did npm install
then, I create ymy server instance. Then rename .env-example file to .env and add your Moralis server credentials.
Finally, via terminal in the project directory run: node index.js

But when start the process of ┬ĘGenerating your NFT collection┬Ę
Appear this error:

Please, any help you can give me.