---
title: "Missing SSL Cert Bind to Port 443"
slug: "missing-ssl-cert-bind-to-port-443"
updated: 2025-07-06T20:59:20Z
published: 2025-07-06T20:59:20Z
canonical: "kb.pharos.com/missing-ssl-cert-bind-to-port-443"
---

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> Fetch the complete documentation index at: https://kb.pharos.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Missing SSL Cert Bind to Port 443

### Issue

Customer is getting an error in the HP Insights portal when attempting to add some printers. The message says:

Unable to install app: The system was unable to install the app on at address." and to check the deployment log. However, the correct model type is displayed.

Deployment log shows exception below:

1) Exception Information

=============================================

Exception Type: System.ServiceModel.CommunicationException

Message: An error occurred while making the HTTP request to https://sentry.server.com:4321/Mps.Client.Mfp/MfpDeployment/MfpDeployment.svc. This could be due to the fact that the server certificate

is not configured properly with HTTP.SYS in the HTTPS case. This could also be caused by a mismatch of the security binding between the client and the server.

HelpLink: NULL

Source: mscorlib

HResult: -2146233087

### Root cause

The SSL Certificate bind to Sentry Print port 4321 or Secure Print Trust Root in Local Computer > Personal > Certificates store is missing.

![A screenshot of a computer program AI-generated content may be incorrect.](https://cdn.document360.io/f4fb58ca-1114-4e59-ba1a-d8f647bd6dcf/Images/Documentation/image-1751835454986.png)