Did it like this. Now everything works. Basically, just added @ symbol. Would like to know what happened though.

{
  "compilerOptions": {
    "module": "CommonJS",
    "target": "ES6",
    "baseUrl": "src",
    "paths": {
      "@*": ["src/*"]
    }
  },
  "include": ["src"],
  "exclude": ["node_modules"]
}