Null point exeption when getPack from FilterPack

[Nuruddin999]

When i open image from gallery:

if (requestCode == PICKIMAGE) {
                data?.data?.let {
                    val bitmap = BitmapUtils.getBitmapFromGallery(this, it, 800, 800)

                    original_filter_bitmap.recycle()
                    final_bitmap.recycle()
                    filtered_bitmap.recycle()
                    original_filter_bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true)
 imageFiltersFragment!!.displayThumbNail(original_filter_bitmap)

and try to display this image in thumbnail

open fun displayThumbNail(bitmap: Bitmap?) {
        var runnable = Runnable {

            var thumbImg: Bitmap?
            if (bitmap == null)
                thumbImg = BitmapUtils.getBitmapFromAsests(activity, MainActivity.pictureName, 100, 100)
            else
                thumbImg = Bitmap.createScaledBitmap(bitmap, 100, 100, false)

            if (thumbImg == null)
                return@Runnable

            ThumbnailsManager.clearThumbs()
            thumbnailList?.clear()
            val thumbnailItem = ThumbnailItem()
            thumbnailItem.image = thumbImg
            thumbnailItem.filterName = "Normal"
            ThumbnailsManager.addThumb(thumbnailItem)
            var filters = FilterPack.getFilterPack(activity!!) as MutableList
            for (f in filters) {
                val item = ThumbnailItem()
                item.image = thumbImg
                item.filter = f
                item.filterName = f.name
                ThumbnailsManager.addThumb(item)
                Log.d("filterpack", f.name)
            }
            thumbnailList!!.addAll(ThumbnailsManager.processThumbs(activity))
            activity!!.runOnUiThread {

                thumbnailAdapter.notifyDataSetChanged()

            }
        }

It throws this exeption
kotlin.KotlinNullPointerException
at com.example.sg772.textonimage.ImageFiltersFragment$displayThumbNail$runnable$1.run(ImageFiltersFragment.kt:110)
line 110: var filters = FilterPack.getFilterPack(activity!!) as MutableList
P.S
When i dont open image from gallery and work with default image , everythings works fine