Update app.py

app.py

@@ -292,8 +292,8 @@ def load_models_and_documents():
         
             sparse_matrices = []
             for embedding in sparse_embeddings:
-                data = embedding.values
-                indices = embedding.indices
+                data = np.array(embedding.values)
+                indices = np.array(embedding.indices)
                 indptr = np.array([0, len(data)])
                 matrix = csr_matrix((data, indices, indptr), shape=(1, max_index + 1))
                 sparse_matrices.append(matrix)