This issue has nothing to do with [this post](https://stackoverflow.com/questions/39826101/react-application-works-on-desktop-but-on-mobile-a-blank-page-is-shown).

I built a full-stack application using create-react-app, Express, and MongoDB. [As you can see](https://project-pyrope.herokuapp.com/), I successfully deployed it on Heroku (no errors in the log). The root ("/") page is supposed to be empty for now.

The problem arises when I try to access the application with my phone (iPhone 5s): I get this blank page, whether I am using Chrome, Firefox, or Safari:

[![Blank page on iPhone 5s](https://i.stack.imgur.com/w7PtT.png)](https://i.stack.imgur.com/w7PtT.png)

I should be able to see the navbar, even though the page has no content. A friend of mine uses an Android phone, and he got the same result.

It doesn't seem like there's a problem with the responsiveness since I can see the navbar with Chrome's developer tools:

[![enter image description here](https://i.stack.imgur.com/0JaQB.png)](https://i.stack.imgur.com/0JaQB.png)

Any idea?