Release date can be null, changed model and added checks.

app/src/main/java/com/github/apognu/otter/adapters/AlbumsAdapter.kt

@@ -43,7 +43,7 @@ class AlbumsAdapter(val context: Context?, private val listener: OnAlbumClickLis
     holder.artist.text = album.artist.name
     holder.release_date.visibility = View.GONE
 
-    album.release_date.split('-').getOrNull(0)?.let { year ->
+    album.release_date?.split('-')?.getOrNull(0)?.let { year ->
       if (year.isNotEmpty()) {
         holder.release_date.visibility = View.VISIBLE
         holder.release_date.text = year

app/src/main/java/com/github/apognu/otter/utils/Models.kt

@@ -71,7 +71,7 @@ data class Album(
   val artist: Artist,
   val title: String,
   val cover: Covers,
-  val release_date: String
+  val release_date: String?
 ) : SearchResult {
   data class Artist(val name: String)