> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goguardian.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fix the Pear Deck Add-on Not Loading in Google Slides

> Resolve known causes of the Pear Deck for Google Slides Add-on failing to load or appear in the sidebar

The GoGuardian Pear Deck Add-on for Google Slides may fail to open, appear blank, or not show up in the **Add-ons** menu due to blocked cookies, Google Workspace domain restrictions, or a browser that needs to be refreshed. Work through the sections below in order to identify and resolve the cause.

## Check Whether Cookies Are Allowed

Pear Deck requires cookies from the following domains to load correctly:

* `*.peardeck.com`
* `*.google.com`
* `*.youtube.com`
* `sign-in.microsoftonline.com`

If any of these are blocked by a browser setting, a Chrome policy, or a network-level filter, the Add-on sidebar will fail to open or will load a blank panel.

1. In Chrome, go to **Settings** → **Privacy and security** → **Third-party cookies**.
2. Under **Allowed to use third-party cookies**, add each domain listed above.
3. Reload Google Slides and try opening the Add-on again.

For step-by-step instructions across all supported browsers, see [Allowing Cookies to Make Pear Deck Work](/products/pear-deck/allow-cookies-for-pear-deck).

## Confirm the Add-on Is Installed or Allowed in Your Google Domain

In Google Workspace for Education domains, Add-ons are restricted by default. If the Pear Deck Add-on does not appear in a teacher's **Add-ons** menu at all, the Google Workspace Administrator must take one of the following actions before teachers can use it:

* **Install the Add-on for all users:** pushes the Add-on to every account in the domain automatically.
* **Allow the Add-on in the Marketplace:** lets teachers install it themselves.

If you are the administrator, see [Install or Allow the Pear Deck Add-on in Your Google Domain](/products/pear-deck/install-allow-add-on-google-domain) for the full steps.

<Note>
  After a domain-wide installation, it can take up to 24 hours for the Add-on to appear in every user's Google Slides menu.
</Note>

## Authorize the Required Client IDs

Some Google Workspace domains restrict Add-on access through client ID controls. If users see an authorization error or the Add-on opens but immediately closes, ask your Google Workspace Administrator to allow the following client IDs in the Google Admin Console:

**For the Pear Deck for Google Slides Add-on:**

* `363332900703-o12os0e8s969uqv0l12gn1m93qr4uonp.apps.googleusercontent.com` (Slides API)
* `363332900703-a6k2qsdjb15a6qmsmebu1c62el4tc83r.apps.googleusercontent.com` (Google Workspace Marketplace listing)

**For users under 18:**

* `379962065044-digedvvia3khonh0n16u1n3teq8ue9q2.apps.googleusercontent.com`
* `689742286244-g7fjuiujmclsmb3r9v5t4vdl00pgkjfd.apps.googleusercontent.com`
* `454012513681-611ndhav2juq04gk1qadsk1co4mgclkj.apps.googleusercontent.com`

## Reload the Add-on in the Browser

If the Add-on is installed and cookies are allowed but the sidebar still does not load, try the following in Chrome:

1. Close all Google Slides tabs.
2. Clear the browser cache: go to **Settings** → **Privacy and security** → **Clear browsing data**, select **Cached images and files**, and click **Clear data**.
3. Reopen your Google Slides presentation.
4. Go to **Extensions** → **Pear Deck for Google Slides Add-on** → **Open Pear Deck Add-on**.

<Note>
  Google Slides Add-ons, including Pear Deck, are only supported on computers. You cannot open the Add-on sidebar on an iPhone, iPad, or other mobile device. You can still start a Pear Deck Session from [Pear Deck Home](https://app.peardeck.com/home/) and students can join Sessions on mobile devices.
</Note>

## Run the Network Diagnostic Test

If the Add-on loads but behaves unexpectedly (slides are blank, responses do not appear, or the session fails to start), a firewall or network filter may be blocking a required service.

1. Open [app.peardeck.com/networktest](https://app.peardeck.com/networktest) on the affected device.
2. Review the results. Any blocked component indicates a domain that needs to be allowed on the network firewall.

Key domains to allow:

| Domain                                                                         | Purpose                                  |
| ------------------------------------------------------------------------------ | ---------------------------------------- |
| `*.firebaseio.com`                                                             | Real-time communication during class     |
| `*.googleapis.com`, `*.google.com`, `*.googleusercontent.com`, `*.gstatic.com` | Google connectivity                      |
| `*.peardeck.com`                                                               | Main website, services, and static files |
| `*.joinpd.com`                                                                 | Student join URL                         |
| `*.s3.amazonaws.com`                                                           | Images shown on student devices          |

For the complete list of required domains, see [Technical Requirements for Pear Deck](/products/pear-deck/technical-requirements).

## Contact Support

If the Add-on still does not load after completing all steps above, contact GoGuardian Support. Include a screenshot of the full browser window (including the URL bar) so the support team can identify whether cookies are blocked or another configuration issue is present.

## Resources

<CardGroup cols={2}>
  <Card title="Allow Cookies for Pear Deck" href="/products/pear-deck/allow-cookies-for-pear-deck">
    Configure browser and network cookie settings required for Pear Deck to function.
  </Card>

  <Card title="Technical Requirements for Pear Deck" href="/products/pear-deck/technical-requirements">
    Review supported devices, browsers, network domains, and client ID requirements.
  </Card>
</CardGroup>