[Vuejs]-Switched to a new laptop and suddenly my Vue project fails to compile with ES6 syntax errors

That problem really looks like it’s babel (the transpiler).

Depending on your project’s configuration, you might have a .babelrc file or babel config in the package.json.

Here you have a similar issue:

https://forum.vuejs.org/t/vue-loader-unexpected-token-error-for-using-spread-operator-on-my-vue-component/10241/6

You might have forgotten (or ignored) to include it into your repository.