diff --git a/client/src/ImageUpload/index.jsx b/client/src/ImageUpload/index.jsx
index e82f6e2..231470a 100644
--- a/client/src/ImageUpload/index.jsx
+++ b/client/src/ImageUpload/index.jsx
@@ -81,23 +81,36 @@ const ImageUpload = ({ onImageUpload, settingsImages }) => {
     }
   };
 
-  const deleteImage = async (filename) => {
+  const deleteImage = async (filename, isNotFound = false) => {
     try {
-      const response = await axios.delete(`${config.SERVER_URL}/uploads/${filename}`);
-      showSnackbar(response.data.message, 'success');
-
-      // Update the state to remove the deleted image
-      const updatedImages = images.filter((image) => image.filename !== filename);
-      setImages(updatedImages);
-      onImageUpload(updatedImages);
-    } catch (error) {
-      if (error?.response?.data) {
-        showSnackbar(error.response.data.message, 'error');
-      } else {
-        showSnackbar(t("error.server_connection"), 'error');
+        if (isNotFound) {
+          const updatedImages = images.filter((image) => image.filename !== filename);
+          setImages(updatedImages);
+          onImageUpload(updatedImages);
+        } else {
+          const response = await axios.delete(`${config.SERVER_URL}/uploads/${filename}`);
+          showSnackbar(response.data.message, 'success');
+          
+          // Update the state to remove the deleted image
+          const updatedImages = images.filter((image) => image.filename !== filename);
+          setImages(updatedImages);
+          onImageUpload(updatedImages);
+        }
+      } catch (error) {
+        if (error?.response?.data) {
+          showSnackbar(error.response.data.message, 'error');
+        } else {
+          showSnackbar(t("error.server_connection"), 'error');
+        }
+        console.error('Error deleting image:', error);
       }
-      console.error('Error deleting image:', error);
-    }
+  };
+
+  const handleImageError = (index) => {
+    const updatedImages = [...images];
+    updatedImages[index].isNotFound = true;
+    setImages(updatedImages);
+    showSnackbar(t("error.image_not_found"), 'error');
   };
 
   const handleRemoveImage = (index) => {
@@ -110,7 +123,7 @@ const ImageUpload = ({ onImageUpload, settingsImages }) => {
       }
     }
     if (imageToRemove && imageToRemove.filename) {
-      deleteImage(imageToRemove.filename);
+      deleteImage(imageToRemove.filename, imageToRemove.isNotFound);
     } else {
       console.error('Error deleting image: imageToRemove or imageToRemove.filename is undefined');
     }
@@ -178,6 +191,7 @@ const ImageUpload = ({ onImageUpload, settingsImages }) => {
             <img
               src={image.preview || image.src}
               alt="preview"
+              onError={() => handleImageError(index)}
               style={{
                 width: '100px',
                 height: '100px',
diff --git a/client/src/Localization/translation-de-DE.js b/client/src/Localization/translation-de-DE.js
index dc73e58..d965b7f 100644
--- a/client/src/Localization/translation-de-DE.js
+++ b/client/src/Localization/translation-de-DE.js
@@ -78,7 +78,8 @@ const translationDeDE = {
   "hide_region": "Region ausblenden",
   "show_region": "Region anzeigen",
   "expand_selection": "Auswahl erweitern",
-  "collapse_selection": "Auswahl verkleinern"
+  "collapse_selection": "Auswahl verkleinern",
+  "error.image_not_found": "Bild nicht gefunden",
 };
 
 export default translationDeDE;
diff --git a/client/src/Localization/translation-en-EN.js b/client/src/Localization/translation-en-EN.js
index 160254a..2828725 100644
--- a/client/src/Localization/translation-en-EN.js
+++ b/client/src/Localization/translation-en-EN.js
@@ -80,6 +80,7 @@ const translationEnEN = {
   "show_region": "Show region",
   "expand_selection": "Expand selection",
   "collapse_selection": "Collapse selection",
+  "error.image_not_found": "Image not found",
 };
 
 export default translationEnEN;
diff --git a/client/src/SnackbarContext/index.jsx b/client/src/SnackbarContext/index.jsx
index 4a70eae..f416e64 100644
--- a/client/src/SnackbarContext/index.jsx
+++ b/client/src/SnackbarContext/index.jsx
@@ -1,39 +1,43 @@
 import { createContext, useState, useContext } from 'react';
 import Snackbar from '@mui/material/Snackbar';
 import Alert from '@mui/material/Alert';
-
+import { Box } from '@mui/material';
 
 const SnackbarContext = createContext({
-  open: false,
-  message: '',
-  severity: 'info',
-  handleClose: () => {},
+  showSnackbar: () => {},
 });
 
 export const SnackbarProvider = ({ children }) => {
-  const [open, setOpen] = useState(false);
-  const [message, setMessage] = useState('');
-  const [severity, setSeverity] = useState('info');
+  const [messages, setMessages] = useState([]);
 
-  const handleClose = () => {
-    setOpen(false);
+  const showSnackbar = (message, severity = 'info') => {
+    setMessages((prevMessages) => [
+      ...prevMessages,
+      { id: new Date().getTime(), message, severity },
+    ]);
   };
 
-  const showSnackbar = (message, newSeverity = 'info') => {
-    setMessage(message);
-    setSeverity(newSeverity);
-    setOpen(true);
+  const handleClose = (index) => {
+    setMessages((prevMessages) => prevMessages.filter((msg, idx) => idx !== index));
   };
 
   return (
-    <SnackbarContext.Provider
-      value={{ open, message, severity, handleClose, showSnackbar }}
-    >
-      <Snackbar open={open} autoHideDuration={6000} onClose={handleClose}>
-        <Alert onClose={handleClose} severity={severity}>
-          {message}
-        </Alert>
-      </Snackbar>
+    <SnackbarContext.Provider value={{ showSnackbar }}>
+      <Box sx={{ position: 'fixed', bottom: 16, left: 16 }}>
+        {messages.map((msg, index) => (
+          <Snackbar
+            key={msg.id+index}
+            open
+            autoHideDuration={6000}
+            anchorOrigin={{ vertical: 'bottom', horizontal: 'left' }}
+            sx={{ mb: index * 8 }}
+          >
+            <Alert onClose={() => handleClose(index)} severity={msg.severity}>
+              {msg.message}
+            </Alert>
+          </Snackbar>
+        ))}
+      </Box>
       {children}
     </SnackbarContext.Provider>
   );
diff --git a/server/app.py b/server/app.py
index b50818b..56628b2 100644
--- a/server/app.py
+++ b/server/app.py
@@ -98,7 +98,11 @@ def upload_file():
 
 @app.route('/uploads/<filename>', methods=['GET'])
 def uploaded_file(filename):
-    return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
+    file_path = os.path.join(app.config['UPLOAD_FOLDER'], filename)
+    if os.path.exists(file_path):
+        return send_from_directory(app.config['UPLOAD_FOLDER'], filename)
+    else:
+        return jsonify({"status": "error", "message": "File not found"}), 404
 
 @app.route('/uploads/<filename>', methods=['DELETE'])
 def delete_file(filename):
@@ -698,6 +702,11 @@ def get_images_info():
         print('Error:', e)
         return jsonify({'error': str(e)}), 500
 
+@app.errorhandler(404)
+def not_found(error):
+    return jsonify({"status": "error", "message": "Resource not found"}), 404
+
+
 @app.route('/', methods=['GET'])
 def main():
     return '''
diff --git a/server/tests/test_app.py b/server/tests/test_app.py
index 9b0019a..99d7955 100644
--- a/server/tests/test_app.py
+++ b/server/tests/test_app.py
@@ -1,4 +1,5 @@
 import unittest
+from unittest.mock import patch
 # import os
 import json
 from io import BytesIO
@@ -42,6 +43,14 @@ def test_images_name(self):
         self.assertEqual(response.status_code, 200)
         self.assertIn(b'configuration', response.data)
 
+    def test_uploaded_file_not_found(self):
+        with patch('os.path.exists') as mock_exists:
+            mock_exists.return_value = False
+            response = self.app.get('/uploads/example.png')
+            self.assertEqual(response.status_code, 404)
+            data = response.get_json()
+            self.assertEqual(data['status'], 'error')
+            self.assertEqual(data['message'], 'File not found')
     
     # def test_save_annotate_info_success(self):
     #     annotate_data = {