yarn does not install dependencies correctly

`yarn` as a package manager does not currently work for the project. If you are using yarn, you'll have to follow these steps to install dependencies.

```
npm i
yarn import
yarn
```

Then, delete package.lock.json from the project.

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You will get **bonus points** for helping resolve this bug (and all the gratitude of others who want to use `yarn` with this project 😄).