App crashing when the photoButton is clicked

Hey there, I had this problem where it kept on crashing with the error:

java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.NullPointerException: Attempt to get length of null array

After putting this in the manifest:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

The camera app launches onClick and I’m able to take a pic - In data/data/<pkgName>/files , I see an image is saved (and replaced when re-taking the pic).

Why is this? I’m testing on a S6 and with Android 10 and I don’t even have an external storage?