diff --git a/mnemo_cards_admin/src/components/BulkCardEditor.tsx b/mnemo_cards_admin/src/components/BulkCardEditor.tsx
index b1bdf5e..eb6bf5e 100644
--- a/mnemo_cards_admin/src/components/BulkCardEditor.tsx
+++ b/mnemo_cards_admin/src/components/BulkCardEditor.tsx
@@ -52,8 +52,20 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
     packsApi
       .getPacks({ page: 1, limit: 100, search: '' })
       .then((response) => {
-        if (response && response.items) {
-          setPacksData(response.items.map((pack) => ({ id: pack.id, title: pack.title })))
+        try {
+          if (response && response.items && Array.isArray(response.items)) {
+            const packs = response.items.map((pack: any) => ({ 
+              id: String(pack.id || ''), 
+              title: String(pack.title || pack.id || '') 
+            }))
+            setPacksData(packs)
+          } else {
+            console.warn('Unexpected packs response format:', response)
+            setPacksData([])
+          }
+        } catch (error) {
+          console.error('Error processing packs response:', error)
+          setPacksData([])
         }
       })
       .catch((error) => {
@@ -66,44 +78,48 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
 
   // Initialize cards data
   useEffect(() => {
-    const initialData = new Map<string, CardData>()
-    images.forEach((image) => {
-      initialData.set(image.id, {
-        imageId: image.id,
-        packId: '',
-        original: '',
-        translation: '',
-        mnemo: '',
-        transcription: '',
-        transcriptionMnemo: '',
-        back: '',
-        imageBack: undefined,
-        isSaved: false,
+    if (images.length > 0) {
+      const initialData = new Map<string, CardData>()
+      images.forEach((image) => {
+        initialData.set(image.id, {
+          imageId: image.id,
+          packId: '',
+          original: '',
+          translation: '',
+          mnemo: '',
+          transcription: '',
+          transcriptionMnemo: '',
+          back: '',
+          imageBack: undefined,
+          isSaved: false,
+        })
       })
-    })
-    setCardsData(initialData)
+      setCardsData(initialData)
+    }
   }, [images])
 
   const currentImage = images[currentIndex]
-  const currentCard = cardsData.get(currentImage?.id || '')
+  const currentCard = currentImage ? cardsData.get(currentImage.id) : undefined
 
   const updateMutation = useMutation({
     mutationFn: (card: GameCardDto) => cardsApi.upsertCard(card),
     onSuccess: (response) => {
       queryClient.invalidateQueries({ queryKey: ['cards'] })
-      const imageId = currentImage.id
-      setCardsData((prev) => {
-        const newData = new Map(prev)
-        const cardData = newData.get(imageId)
-        if (cardData && response.card) {
-          newData.set(imageId, {
-            ...cardData,
-            isSaved: true,
-            cardId: response.card.id,
-          })
-        }
-        return newData
-      })
+      if (currentImage) {
+        const imageId = currentImage.id
+        setCardsData((prev) => {
+          const newData = new Map(prev)
+          const cardData = newData.get(imageId)
+          if (cardData && response.card) {
+            newData.set(imageId, {
+              ...cardData,
+              isSaved: true,
+              cardId: response.card.id,
+            })
+          }
+          return newData
+        })
+      }
       toast.success('Card saved successfully')
     },
     onError: (error: unknown) => {
@@ -113,7 +129,7 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
   })
 
   const handleFieldChange = (field: keyof CardData, value: string) => {
-    if (!currentCard) return
+    if (!currentCard || !currentImage) return
 
     setCardsData((prev) => {
       const newData = new Map(prev)
@@ -170,8 +186,21 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
   const savedCount = Array.from(cardsData.values()).filter((card) => card.isSaved).length
   const totalCount = images.length
 
+  // Wait for images and cards data to be initialized
+  if (images.length === 0) {
+    return (
+      <div className="p-4">
+        <p className="text-muted-foreground">No images uploaded</p>
+      </div>
+    )
+  }
+
   if (!currentImage || !currentCard) {
-    return <div>Loading...</div>
+    return (
+      <div className="p-4">
+        <p className="text-muted-foreground">Initializing card data...</p>
+      </div>
+    )
   }
 
   return (
@@ -199,15 +228,25 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
         <Card>
           <CardHeader>
             <CardTitle>Image Preview</CardTitle>
-            <CardDescription>{currentImage.file.name}</CardDescription>
+            <CardDescription>{currentImage.file?.name || 'Unknown'}</CardDescription>
           </CardHeader>
           <CardContent>
             <div className="relative aspect-square border rounded-lg overflow-hidden bg-muted">
-              <img
-                src={currentImage.preview}
-                alt={currentImage.file.name}
-                className="w-full h-full object-contain"
-              />
+              {currentImage.preview ? (
+                <img
+                  src={currentImage.preview}
+                  alt={currentImage.file?.name || 'Card image'}
+                  className="w-full h-full object-contain"
+                  onError={(e) => {
+                    console.error('Failed to load image:', currentImage.preview)
+                    e.currentTarget.style.display = 'none'
+                  }}
+                />
+              ) : (
+                <div className="w-full h-full flex items-center justify-center text-muted-foreground">
+                  Image preview not available
+                </div>
+              )}
             </div>
           </CardContent>
         </Card>
@@ -222,19 +261,21 @@ export function BulkCardEditor({ images, onComplete, onCancel }: BulkCardEditorP
             <div className="space-y-2">
               <Label htmlFor="packId">Pack ID (optional)</Label>
               <Select
-                value={currentCard.packId}
-                onValueChange={(value: string) => handleFieldChange('packId', value)}
+                value={currentCard.packId || undefined}
+                onValueChange={(value: string) => handleFieldChange('packId', value || '')}
               >
                 <SelectTrigger>
                   <SelectValue placeholder="Select a pack (optional)" />
                 </SelectTrigger>
                 <SelectContent>
                   <SelectItem value="">None</SelectItem>
-                  {packsData.map((pack) => (
-                    <SelectItem key={pack.id} value={pack.id}>
-                      {pack.title}
-                    </SelectItem>
-                  ))}
+                  {packsData && packsData.length > 0 ? (
+                    packsData.map((pack) => (
+                      <SelectItem key={pack.id} value={pack.id}>
+                        {pack.title || pack.id}
+                      </SelectItem>
+                    ))
+                  ) : null}
                 </SelectContent>
               </Select>
             </div>
diff --git a/mnemo_cards_admin/src/pages/CardsPage.tsx b/mnemo_cards_admin/src/pages/CardsPage.tsx
index 9fdd38b..9dcb7a9 100644
--- a/mnemo_cards_admin/src/pages/CardsPage.tsx
+++ b/mnemo_cards_admin/src/pages/CardsPage.tsx
@@ -366,19 +366,21 @@ export default function CardsPage() {
               <div className="space-y-2">
                 <Label htmlFor="packId">Pack ID (optional)</Label>
                 <Select
-                  value={formData.packId}
-                  onValueChange={(value: string) => setFormData(prev => ({ ...prev, packId: value }))}
+                  value={formData.packId || undefined}
+                  onValueChange={(value: string) => setFormData(prev => ({ ...prev, packId: value || '' }))}
                 >
                   <SelectTrigger>
                     <SelectValue placeholder="Select a pack (optional)" />
                   </SelectTrigger>
                   <SelectContent>
                     <SelectItem value="">None</SelectItem>
-                    {packsData?.items.map((pack) => (
-                      <SelectItem key={pack.id} value={pack.id}>
-                        {pack.title}
-                      </SelectItem>
-                    ))}
+                    {packsData?.items && packsData.items.length > 0 ? (
+                      packsData.items.map((pack) => (
+                        <SelectItem key={pack.id} value={pack.id}>
+                          {pack.title || pack.id}
+                        </SelectItem>
+                      ))
+                    ) : null}
                   </SelectContent>
                 </Select>
               </div>
diff --git a/mnemo_cards_admin/src/pages/UsersPage.tsx b/mnemo_cards_admin/src/pages/UsersPage.tsx
index 25feeb9..cc49d6b 100644
--- a/mnemo_cards_admin/src/pages/UsersPage.tsx
+++ b/mnemo_cards_admin/src/pages/UsersPage.tsx
@@ -387,10 +387,10 @@ export default function UsersPage() {
               <div className="space-y-2">
                 <Label>Packs Owned</Label>
                 <div className="border rounded-lg max-h-[200px] overflow-y-auto p-2">
-                  {packsData?.items.length === 0 ? (
+                  {!packsData?.items || packsData.items.length === 0 ? (
                     <div className="text-sm text-muted-foreground">No packs available</div>
                   ) : (
-                    packsData?.items.map((pack) => (
+                    packsData.items.map((pack) => (
                       <div key={pack.id} className="flex items-center space-x-2 py-1">
                         <Checkbox
                           id={`pack-${pack.id}`}