Update app.py

app.py

@@ -34,8 +34,8 @@ app.layout = dbc.Container([
         accept='.docx,.pdf'
     ),
     html.Div(id='upload-output'),
-    dbc.Spinner(html.Div(id="upload-spinner"), color="primary", type="grow", style={"display": "none"}),
-    dbc.Spinner(html.Div(id="conversion-spinner"), color="secondary", type="grow", style={"display": "none"}),
+    dbc.Spinner(html.Div(id="upload-spinner"), color="primary", type="grow", spinner_style={"display": "none"}),
+    dbc.Spinner(html.Div(id="conversion-spinner"), color="secondary", type="grow", spinner_style={"display": "none"}),
     dbc.Button("Convert and Download", id="convert-button", color="primary", className="mt-3", disabled=True),
     dcc.Download(id="download-zip")
 ])
@@ -82,8 +82,8 @@ def process_files(contents, filenames):
 @app.callback(
     [Output('upload-output', 'children'),
      Output('convert-button', 'disabled'),
-     Output('upload-spinner', 'style'),
-     Output('conversion-spinner', 'style'),
+     Output('upload-spinner', 'spinner_style'),
+     Output('conversion-spinner', 'spinner_style'),
      Output('download-zip', 'data')],
     [Input('upload-data', 'contents'),
      Input('upload-data', 'filename'),