CSV, PDF, DOCX greyed out and not clickable

I'm using version `com.theartofdev.edmodo:android-image-cropper:2.7.0`

Below code

```
private fun handleImageClick() {
if (CropImage.isExplicitCameraPermissionRequired(activity!!) && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(arrayOf(Manifest.permission.CAMERA), CropImage.CAMERA_CAPTURE_PERMISSIONS_REQUEST_CODE)
} else {
CropImage.startPickImageActivity(activity!!)
}
}
```
triggers the following screen:


When clicking "Bestanden" (Files), below screen is displayed:


I want to be able to select PDF, CSV and DOCX as well, but it's greyed out. How can I make them selectable?

Please note:
- That with the other options like Dropbox, Drive, they are not greyed out.
- I'm not using the CropImage functionality to load the PDF, but another library. I just need a trigger in my onActivityResult.

Tested on: Android 8.0, Samsung S8