Fix playlist form from crashing after double save (#3893)

Author: sabrina-kiam

packages/web/src/components/create-playlist/PlaylistForm.tsx

@@ -171,7 +171,7 @@ const PlaylistForm = ({
 
   const onSave = () => {
     const nameIsEmpty = !formFields.playlist_name
-    const artworkIsEmpty = !formFields.artwork.file && !coverArt
+    const artworkIsEmpty = !formFields.artwork?.file && !coverArt
     if (nameIsEmpty || artworkIsEmpty) {
       setErrors({
         ...errors,
@@ -189,10 +189,10 @@ const PlaylistForm = ({
       <div className={styles.playlistForm}>
         <UploadArtwork
           defaultPopupOpen={initialFocusedField === 'artwork'}
-          artworkUrl={formFields.artwork.url || coverArt}
+          artworkUrl={formFields.artwork?.url || coverArt}
           onDropArtwork={onDropArtwork}
           error={errors.artwork}
-          imageProcessingError={Boolean(formFields.artwork.error)}
+          imageProcessingError={Boolean(formFields.artwork?.error)}
           onOpenPopup={onOpenArtworkPopup}
           onClosePopup={onCloseArtworkPopup}
           isImageAutogenerated={formFields.is_image_autogenerated}