Office Apps Not Opening

Fix Excel Web Add-ins Not Loading or Connecting to Office Store

Maira Mehtab Sep 20, 2026 868 views

Question details

Users are unable to load or connect to add-ins like the Stock Connector in Excel for the web due to an Office Store catalog server issue.

Product: Microsoft Excel for the Web
Device & OS: not provided
Scenario: Attempting to open, load, or install web add-ins while working on a spreadsheet in Excel online.
Observed behavior: Add-ins fail to load, and the browser cannot connect to the Office App Store server. Standard troubleshooting like clearing cache or using private browsing does not resolve the issue.

Before you start

Verify your internet connection and check the Microsoft 365 Service Health dashboard to confirm if there is an active server outage affecting Excel for the web.

Solution 1Recommended

Use the Excel Desktop Application

Switch to the desktop version of Excel, which relies on local caching and is often unaffected by web-based server connection issues.

Since the connection issue originates from a service-side problem with the Excel web servers, browser-level troubleshooting (like clearing cache or reinstalling) will not work. The most effective workaround is to move your work to the desktop client until the server connection is restored.

Open your file in the desktop app

While viewing your spreadsheet in Excel for the web, look for the 'Editing' or 'Viewing' ribbon at the top and click the 'Open in Desktop App' button.

Launch the add-in locally

Once the file opens in your desktop Excel application, navigate to the 'Insert' tab, click 'My Add-ins', and launch the Stock Connector or your required add-in.

Save changes automatically

Ensure AutoSave is turned on in the top-left corner of the desktop app so your changes sync back to the cloud.

Desktop Add-ins: Add-ins that have already been installed on your desktop client usually continue to function normally during web-server outages.

Solution 2

Monitor the Microsoft Feedback Portal

Track the status of the server outage directly through Microsoft's official channels to know when the web issue is resolved.

Free Microsoft Office alternative

Switch to WPS Office for a Reliable Desktop Experience

When Microsoft Excel Web experiences server-side add-in outages, your workflow shouldn't have to stop. WPS Office provides a robust, free, and lightweight desktop alternative with excellent Microsoft format compatibility, allowing you to edit your spreadsheets smoothly without relying on web servers.

1. Download WPS Office: Visit the official WPS website and download the free desktop application for your operating system.
2. Install the Software: Run the downloaded installer and follow the brief on-screen instructions to complete the setup.
3. Open Your Spreadsheet: Launch WPS Spreadsheets and open your .xlsx file directly to continue working offline with full features.

Free and lightweight desktop office suiteHigh compatibility with Microsoft Excel (.xlsx) formatsRich built-in formulas and tools without relying on web add-insSeamless offline editing unaffected by server outages

microsoft office alternative - wps office

Frequently Asked Questions

Why are my Excel Web add-ins suddenly not working?

This is typically caused by temporary server-side fluctuations or outages on Microsoft's end, preventing Excel for the web from successfully connecting to the Office Store catalog.

Do Excel add-ins still work on the desktop app when the web version is down?

Yes, desktop applications usually maintain their local add-in cache and functionality. Opening your file in the desktop app allows you to bypass web-only server connection issues.

Does clearing my browser cache fix the Office Store connection error?

If the issue is a service-side problem at Microsoft, clearing your browser cache, cookies, or using Incognito mode will not resolve it. You must wait for Microsoft to deploy a server fix.

How can I check if the Excel web add-in issue is resolved?

You can monitor Microsoft's official Feedback Portal or check the Microsoft 365 Service Health Dashboard from your admin center to track service restoration updates.

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