Error in postbuild when using react-snap

[wsabrinal]

Bug Report

Current Behavior
I've created an app using create-react-app and everything was working fine, including the build. I've followed the steps to implement react-snap (installed using npm, modified index.js, and added the postbuild in package.json). When I build now, I get the following error:

> project@0.1.0 postbuild
> react-snap

node:internal/modules/cjs/loader:361
      throw err;
      ^

Error: Cannot find module 'D:\project\node_modules\minimalcss\node_modules\csso\node_modules\css-tree\lib\index'. Please verify that the package.json has a valid "main" entry
    at tryPackage (node:internal/modules/cjs/loader:353:19)
    at Function.Module._findPath (node:internal/modules/cjs/loader:566:18)
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:919:27)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (D:\project\node_modules\minimalcss\node_modules\csso\lib\index.js:1:15)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32) {
  code: 'MODULE_NOT_FOUND',
  path: 'D:\\project\\node_modules\\minimalcss\\node_modules\\csso\\node_modules\\css-tree\\package.json',
  requestPath: 'css-tree'
}

It could be that this is no bug at all and that I'm missing something, but I have no clue and couldn't find something similar online.

Steps to reproduce
I've just created a new react app (using create-react-app) and created some pages. The following dependencies have been added:

  "dependencies": {
    "@testing-library/jest-dom": "^5.16.3",
    "@testing-library/react": "^12.1.4",
    "@testing-library/user-event": "^13.5.0",
    "bootstrap": "^5.1.3",
    "leaflet": "^1.7.1",
    "react": "^17.0.2",
    "react-bootstrap": "^2.2.2",
    "react-dom": "^17.0.2",
    "react-helmet": "^6.1.0",
    "react-icons": "^4.3.1",
    "react-leaflet": "^3.2.5",
    "react-router-dom": "^6.2.2",
    "react-scripts": "5.0.0",
    "web-vitals": "^2.1.4"
  },

When I remove the line "postbuild": "react-snap" in package.json, I get no build error anymore.

Expected behavior/code
I would expect that it just builds. :)