java.lang.NullPointerException: Attempt to get length of null array

[alexeyvasilyev]

type=1400 audit(0.0:4262): avc: denied { read } for name="/" dev="rootfs" ino=2 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:rootfs:s0 tclass=dir permissive=0 ppid=2834 pcomm="main" pgid=2834 pgcomm="main"

08-01 12:08:17.129 W/System.err(30056): java.lang.NullPointerException: Attempt to get length of null array
08-01 12:08:17.129 W/System.err(30056): 	at com.github.angads25.filepicker.filepicker.utils.Utility(SourceFile:72)
08-01 12:08:17.129 W/System.err(30056): 	at com.github.angads25.filepicker.view.FilePickerDialog.onStart(SourceFile:240)
08-01 12:08:17.129 W/System.err(30056): 	at android.app.Dialog.show(Dialog.java:302)
08-01 12:08:17.129 W/System.err(30056): 	at com.github.angads25.filepicker.view.FilePickerDialog.show(SourceFile:417)

Android: 7.1.1 (API: 25)
Manufacturer: Sony
Model: G8142
Device: G8142
Board: msm8998
Brand: Sony
Product: G8142
Screen: 1080x1776 (403dpi, xxhdpi)