Fixed: Error on artist details if refresh isn't finished

frontend/src/Artist/Details/ArtistDetailsSeason.js

@@ -29,11 +29,13 @@ function getAlbumTypeStatistics(albums) {
   let sizeOnDisk = 0;
 
   albums.forEach((album) => {
-    sizeOnDisk = sizeOnDisk + album.statistics.sizeOnDisk;
-    trackFileCount = trackFileCount + album.statistics.trackFileCount;
+    if (album.statistics) {
+      sizeOnDisk = sizeOnDisk + album.statistics.sizeOnDisk;
+      trackFileCount = trackFileCount + album.statistics.trackFileCount;
 
-    if (album.statistics.trackFileCount === album.statistics.totalTrackCount || (album.monitored && isBefore(album.airDateUtc))) {
-      albumCount++;
+      if (album.statistics.trackFileCount === album.statistics.totalTrackCount || (album.monitored && isBefore(album.airDateUtc))) {
+        albumCount++;
+      }
     }
 
     if (album.monitored) {