# Cannot log in on Sandbox to install SharinPix - what should I do?

## Problem

When you try to install SharinPix on a **Salesforce Sandbox**, the installer/login page may automatically redirect you to your **Production** login screen instead of the Sandbox login screen. As a result, you can’t authenticate into the Sandbox to complete the installation.

## Cause

This usually happens because Salesforce defaults to the Production login domain, or your browser/session is already linked to a Production domain.

## Solution

1. **On the Salesforce login page** that appears during the installation process, click **Use Custom Domain**

<figure><img src="https://751044238-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi8tH1o5AHthxksYgF6ij%2Fuploads%2FHToPsCgscZrgtkCKOpoV%2F7.png?alt=media&#x26;token=4128fabf-db73-4146-a8c8-9e81fa14e07e" alt=""><figcaption></figcaption></figure>

2. **Enter your Sandbox custom domain** (for example: `yourcompany--sandboxname`) and continue.

<figure><img src="https://751044238-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi8tH1o5AHthxksYgF6ij%2Fuploads%2FhwdgGSNYdZJRxOrkf5qJ%2F8.png?alt=media&#x26;token=e166152d-d444-4af5-9a06-984603fe88c5" alt=""><figcaption></figcaption></figure>

3. You should now be **redirected to the Sandbox login screen**.
4. Enter your **Sandbox credentials** and log in to sandbox.

<figure><img src="https://751044238-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi8tH1o5AHthxksYgF6ij%2Fuploads%2FbPO2mVng7FGSgOTsFNQr%2F5.png?alt=media&#x26;token=de5275a7-f402-49bb-b4e3-a4b6c61df1ff" alt=""><figcaption></figcaption></figure>

5. Once authenticated, you can **continue the SharinPix installation** normally by following the installation documentation: [*Install SharinPix from the App Exchange in a Sandbox*](https://app.gitbook.com/s/2putv2B9RAZpym8daOH2/basic-setup/basic-setup-steps-start-with-sharinpix-in-3-steps)

{% hint style="success" %}
If you still have issues, please [contact our support team](https://app.gitbook.com/s/2putv2B9RAZpym8daOH2/how-to-contact-support) for help.
{% endhint %}