[bug]: repl not able to fetch bundle from bundle.run

**Description**
The `repl` page is not able to fetch the required bundle from the `bundle.run`.

**Steps to reproduce**
1. Got to repl
2. Open console or network tab of the dev tools.
3. Now select any of the settings, say `Time Travel`.

**Current Behaviour**
```error
GET https://bundle.run/@babel/polyfill@7 net::ERR_ABORTED 503
```


**Expected Behaviour**
No Error.