Gracefully handle when a widget URL is re-requested and fails

[cbarratt]

Describe the bug

I'm attempting to figure out a nice way of using the SDK and handling a use case where a user refreshes the UI and the widget tries to load again.

When the iframe loads, I'm seeing:

Due to the it loading an error page inside the frame, there doesn't appear to be any events or anything we can do to detect this problem 🤔

Steps to reproduce

[Steps to reproduce the behavior:]

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

[A clear and concise description of what you expected to happen.]

Screenshots

[If applicable, screenshots go here.]

Sample code

[Code snippet used to reproduce the issue.]

Additional context

I'm using the web widget SDK with React/NextJS. It works great with all the message event listeners.

[idealamz]

The URL you supply to the widget is for a single usage so after the refresh, it's not valid anymore.