[@snowpack/plugin-optimize] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined

[DenisTimofijuk]

I am using @snowpack/app-template-blank-typescript with default configs. Everything was working fine up to that point when I installed npm install --save-dev @snowpack/plugin-optimize. Using suggested configuration I am getting an error. Please help.

/** @type {import("snowpack").SnowpackUserConfig } */
module.exports = {
    mount: {
        public: { url: '/', static: true },
        src: { url: '/dist' },
    },
    plugins: [
        '@snowpack/plugin-typescript', ['@snowpack/plugin-optimize', {
            minifyJS: true,
            target: 'es2018'
        }]
    ],
    install: [
        /* ... */
    ],
    installOptions: {
        installTypes: true,
    },
    devOptions: {
        /* ... */
    },
    buildOptions: {
        /* ... */
    },
    proxy: {
        /* ... */
    },
    alias: {
        /* ... */
    },
};

`$ npm run build

@ build F:\Projects\my_first_snowpack
snowpack build

[snowpack] ! building source files...
[snowpack] ✔ build complete [0.08s]
[snowpack] ! installing dependencies...
[snowpack] ! verifying build...
[snowpack] ✔ verification complete [0.01s]
[snowpack] ! writing build to disk...
[snowpack] ! optimizing build...
[@snowpack/plugin-optimize] TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ build: snowpack build
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\dennk\AppData\Roaming\npm-cache_logs\2021-01-18T15_11_11_711Z-debug.log`

package.json

{
  "scripts": {
    "start": "snowpack dev",
    "build": "snowpack build",
    "test": "echo \"This template does not include a test runner by default.\" && exit 1",
    "format": "prettier --write \"src/**/*.{ts,js}\"",
    "lint": "prettier --check \"src/**/*.{ts,js}\""
  },
  "dependencies": {
    "canvas-confetti": "^1.3.3"
  },
  "devDependencies": {
    "@snowpack/plugin-optimize": "^0.2.13",
    "@snowpack/plugin-typescript": "^1.2.1",
    "@types/canvas-confetti": "^1.0.0",
    "@types/snowpack-env": "^2.3.2",
    "prettier": "^2.0.5",
    "snowpack": "^2.18.4",
    "typescript": "^4.0.0"
  }
}