Callback error on sagemaker(aws) server

Hi,

I am developing a dashboard on aws sagemaker. The dashboard is able to display everything except callback items. The code works fine on my local computer.

Here is the error message I got.


I am quite new to aws and computer networks.

I set ‘requests_pathname_prefix’ to ‘/proxy/8050/’ as it run on the aws notebook server.

Really appreciate if someone can help me out.