---
title: Adding the HTTP Proxy Certificate to The Trusted Certificate Store
slug: end-user-guide-3-5-0-legacy-ui/adding-the-http-proxy-certificate-to-the-trusted-certificate-store
description: Learn how to troubleshoot Certificate Error pop-ups when logging in through an HTTP Proxy. Discover why the error occurs and how to resolve it by adding the HTTP Proxy certificate to the trusted certificate store on your operating system. The document inc
docTags: 
createdAt: 2022-08-12T15:13:19.000Z
---

If you haven’t already added the HTTP Proxy certificate to the trusted certificate store, the **Certificate Error** pop-up will appear when you attempt to log in through HTTP Proxy. This pop-up will prompt you to download and install the HTTP Proxy certificate to the related store on the OS.

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Press the Yes button to install a certificate. After this, the HTTP Proxy certificate can be found “C:\Users\\\{user}\AppData\Roaming\Krontech Single-Connect\additionalResources” on Windows OS and “/Users/\{user}/Library/Application Support/Krontech Single-Connect/additionalResources” on MacOS.