### Answer
It sounds like you're encountering an issue related to hosting environments or the network configuration when trying to deploy the Vapi Web SDK outside of the localhost environment. Here are a few things to consider:
1. **Cross-Origin Resource Sharing (CORS)**: When deploying on AWS S3 or another domain, ensure that CORS settings are configured correctly. The Vapi Web SDK might be trying to access resources that are not allowed by the CORS policy of your server.
2. **Public Key Configuration**: Verify that the public key used is correct and is intended for the deployment environment. Sometimes, keys that work on localhost might not be configured for other environments.
3. **HTTPS Requirement**: Modern browsers require secure contexts (HTTPS) for many features. If your server is hosted on HTTP (like your S3 example), it may cause issues. Try configuring your server to serve content over HTTPS.
4. **Network Configuration**: Check if there are any network configuration issues, like firewalls or security groups on AWS, that might be blocking the SDK's network requests.
Here’s a basic checklist to ensure your environment is configured correctly:
- Ensure your domain is correctly configured for HTTPS if you're moving away from localhost.
- Verify CORS policies allow requests from your domain.
- Double-check your public key and other configuration details specific to the Vapi setup.
These are general recommendations and without specific error messages, it's challenging to provide a more detailed solution. If you continue to face issues, reviewing the server and browser console logs for any error messages can provide more insights into what might be going wrong.