Typescript - Uncaught ReferenceError: exports is not defined

Im getting this error message (Uncaught ReferenceError: exports is not defined) when trying to import other ts files in the main app.ts

app.ts

import { LanguagesConfigs } from './LanguagesConfigs';
let languagesConfigs = new LanguagesConfigs();

LanguagesConfigs.ts

export class LanguagesConfigs {
 code
}

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "sourceMap": true
    }
}

I compile it in visual studio code. It generates the .js and .js.map files

Note: I'm not using frames like angular, just plain typescript. Note2: CommonJS is installed in the project (Typescript ReferenceError: exports is not defined)