Excel none issue solved

app.py

@@ -65,7 +65,8 @@ def read_document(file):
             for sheet in wb.worksheets:
                 for row in sheet.rows:
                     for cell in row:
-                        content += str(cell.value) + ' '
+                        if cell.value is not None: 
+                            content += str(cell.value) + ' '
             return content
         except Exception as e:
             return f"Error reading XLSX: {e}"