Failed to create subscription: WebHook responds with incorrect HTTP status. HTTP status is 404

I have an unbuntu server running apache with virtual directories.  I’m getting the following  error when I attempt to register a webhook:  Failed to create subscription: WebHook responds with incorrect HTTP status. HTTP status is 404.  

The code that is rendering this error is: 

async function createSubscription() {
    try {
        let response = await platform.post('/restapi/v1.0/subscription', {
            eventFilters: [
                "/restapi/v1.0/account/~/extension/~/telephony/sessions"
            ],
            deliveryMode: {
                transportType: "WebHook",
                address: process.env.WEBHOOK_URL
            }
        });
        console.log("Subscription created:", response.data);
    } catch (error) {
        console.error("Failed to create subscription:", error.message);
    }
}