Bundle error while setting up development environment using es6.

What kind of development environment do you set up?

If you think you set it up properly, but it doesn't work, delete node-modules, install npm, and install it again.

Also, please upload the settings in text instead of the image.

An error occurred while executing the rollup -

https://rollupjs.org/guide/en

According to this document, the -c option means that you want to use the config file, but look at rollup.config.js for possible misconfiguration.