Copilot Not Working

Fix Microsoft 365 Copilot Browser Tabs Loading Indefinitely

Maira Mehtab Sep 22, 2026 869 views

Question details

Users are experiencing an issue where browser tabs connected to Microsoft 365 Copilot fail to open and load indefinitely.

Product: Microsoft 365 Copilot
Device & OS: not provided
Scenario: Accessing Microsoft 365 web applications such as Word and Excel that are integrated with Copilot.
Observed behavior: Browser tabs remain stuck in a continuous loading loop instead of displaying the application interface or document.

Before you start

Ensure you have a stable internet connection and verify that your Microsoft 365 subscription is active and includes Copilot access.

Solution 1Recommended

Clear Browser Cache and Cookies

Clearing your browser's stored data often resolves infinite loading loops caused by outdated or corrupted session cookies.

Corrupted browser cache or invalid session cookies can prevent Microsoft 365 web applications from authenticating correctly, leading to an endless loading screen.

Open Browser Settings

Navigate to the settings menu of your web browser (e.g., Google Chrome, Microsoft Edge) by clicking the three-dot menu in the upper right corner.

Locate Browsing Data

Find the 'Privacy, search, and services' or 'Privacy and security' section and select 'Clear browsing data'.

Clear Cache and Cookies

Select 'Cookies and other site data' and 'Cached images and files', then click the 'Clear data' button.

Restart Browser

Close the browser completely, reopen it, and attempt to load the Microsoft 365 Copilot tab again.

Tip: Setting the time range to 'All time' when clearing your data provides the best chance of resolving persistent loading errors.

Solution 2

Test in a Private Window or Alternative Browser

Using an incognito or private window helps determine if browser extensions or current session data are causing the infinite loading issue.

Solution 3

Verify Status with Colleagues and Contact Support

If local browser fixes do not work, the issue might be a broader service outage or a tenant-level configuration problem.

Free Microsoft Office alternative

Avoid Browser Loading Issues with WPS Office Desktop

Tired of browser tabs loading indefinitely? Switch to WPS Office, a lightweight and stable desktop application that offers excellent compatibility with Microsoft Office files and features its own powerful AI assistant.

1. Download WPS Office: Visit the official WPS website and download the free desktop installer.
2. Install the Application: Run the setup file and follow the on-screen instructions to install WPS Office on your computer.
3. Open Your Files Offline: Double-click your Word, Excel, or PowerPoint files to open them instantly without relying on a web browser.

Avoid browser-dependent loading errors with a robust desktop client.Highly compatible with Microsoft Office formats like DOCX, XLSX, and PPTX.Built-in WPS AI to help you write, summarize, and analyze documents instantly.Free, lightweight, and uses minimal system resources.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Microsoft 365 Copilot get stuck on the loading screen?

This is typically caused by corrupted browser cache, conflicting browser extensions, or temporary network connectivity issues between your device and Microsoft's authentication servers.

Will disabling browser extensions fix the Microsoft 365 loading issue?

Yes, ad blockers, privacy extensions, or script blockers can sometimes prevent the necessary scripts required by Microsoft 365 Copilot from running. Disabling them or using an incognito window can help bypass the issue.

Does this loading issue affect desktop applications?

Generally, this specific infinite loading issue is confined to web browsers. If you have the Microsoft 365 desktop apps installed on your computer, you may still be able to open your documents and use Copilot without issues.

Microsoft Copilot Issues