Why Copilot Shows Empty Response After Submitting a Prompt

You type a detailed prompt in Copilot, press Enter, and the response area stays blank. The cursor may blink, or a spinner appears briefly then stops. This empty response issue can happen in Copilot for Microsoft 365, Copilot in Edge, or the standalone Copilot app. The root cause is usually a network interruption, a content filter block, or a temporary service glitch. This article explains why Copilot returns nothing and provides the exact steps to restore normal output.

Why Copilot Returns a Blank Screen After You Send a Prompt

When you submit a prompt, Copilot sends your text to a Microsoft cloud service that processes the request using a large language model. The model generates a reply and sends it back to your client. An empty response means one of these steps failed silently.

The most common reasons are:

• Network timeout or packet loss: The response payload is blocked by a firewall, proxy, or VPN. The client waits for data that never arrives.
• Content filter rejection: Microsoft’s responsible AI filter detects a policy violation in either your prompt or the model’s draft response. The filter drops the output without showing an error message.
• Session token expiry: Your authentication token expires during long idle periods. Copilot cannot fetch the response because the server refuses the request.
• Browser extension conflict: Ad blockers, script blockers, or privacy extensions strip the response container from the page.

The fix depends on which cause applies to your situation. The steps below cover each scenario.

Steps to Restore Copilot Output After an Empty Response

Method 1: Refresh the Copilot Session

1. Click the refresh icon in the Copilot pane
   In Copilot for Microsoft 365 apps like Word or Teams, locate the circular arrow icon at the top of the Copilot pane. Click it once. This resets the local session without losing your chat history.
2. Press F5 if the refresh icon is missing
   In the standalone Copilot website or Edge sidebar, press F5 on your keyboard. The entire page reloads. Re-type your prompt after the page loads.
3. Check if the response appears now
   Submit a simple test prompt such as “Summarize this page in three sentences.” If output returns, the empty response was caused by a temporary session glitch.

Method 2: Verify Service Health

1. Open the Microsoft 365 admin center
   Go to admin.microsoft.com and sign in as a global admin or service admin.
2. Navigate to Health > Service health
   From the left navigation menu, select Health, then Service health. The page lists all Microsoft 365 services and their current status.
3. Look for Copilot in the list
   Find the row labeled “Copilot for Microsoft 365” or “Microsoft Copilot.” If the status shows a yellow warning or red exclamation, the service is degraded. Wait for Microsoft to resolve the incident and try again later.

Method 3: Clear Browser Cache and Cookies

1. Open your browser’s settings
   In Microsoft Edge, click the three-dot menu in the top-right corner and select Settings. In Chrome, click the three-dot menu and choose Settings.
2. Go to Privacy and security > Clear browsing data
   In Edge, select Privacy, search, and services, then click Choose what to clear under Clear browsing data. In Chrome, select Privacy and security, then Clear browsing data.
3. Select cached images and files, then cookies
   Check the boxes for “Cached images and files” and “Cookies and other site data.” Set the time range to “All time.” Click Clear now.
4. Close and reopen the browser
   Restart the browser. Sign in to Microsoft 365 again and test Copilot.

Method 4: Disable Browser Extensions Temporarily

1. Open the extension manager
   In Edge, type edge://extensions in the address bar. In Chrome, type chrome://extensions.
2. Turn off ad blockers and script blockers
   Find extensions such as uBlock Origin, AdBlock, Ghostery, or NoScript. Toggle the switch to disable them.
3. Reload the Copilot page and test
   Go back to Copilot and submit a prompt. If the response appears, re-enable extensions one by one to identify the conflicting one.

Method 5: Re-authenticate Your Microsoft 365 Account

1. Sign out of all Microsoft 365 apps
   In the top-right corner of any Microsoft 365 app, click your profile picture and select Sign out.
2. Close the browser completely
   Exit all browser windows, not just the tab.
3. Open the browser and sign in again
   Navigate to office.com and sign in with your work or school account. Launch Copilot and test with a simple prompt.

If Copilot Still Shows Empty Responses After the Main Fix

Copilot returns blank output only for long prompts

If short prompts work but long prompts produce empty responses, the content filter may be rejecting the output due to length or topic. Break your prompt into smaller segments and submit each part separately. For example, instead of asking for a 2000-word report, ask for an outline first, then expand each section.

Copilot works in one app but not another

This indicates a per-app configuration issue. In Microsoft Teams, check that the Copilot app is installed and enabled. Go to Apps in the left sidebar, search for Copilot, and select Add if it shows as not installed. In Word or Excel, verify that the Copilot toggle in the View tab is turned on.

Copilot shows empty response only on mobile

The mobile app may have a stale cache. Clear the app cache in your phone settings. On iOS, go to Settings > General > iPhone Storage > Microsoft Copilot > Offload App. On Android, go to Settings > Apps > Microsoft Copilot > Storage > Clear Cache. Reinstall the app if the problem persists.

Copilot Empty Response vs Other Copilot Errors: Key Differences

Item	Empty Response	Error Message Response
Visual cue	Blank white area, no text, no error code	Red banner or dialog with an error number like 500 or 429
Likely cause	Network block, filter rejection, or session timeout	Server overload, quota exceeded, or authentication failure
First fix to try	Refresh the pane or clear browser cache	Check service health and wait 15 minutes
User action needed	Disable extensions or shorten the prompt	Contact IT admin or upgrade license

An empty response is a silent failure. An error message gives you a code to investigate. The table above helps you choose the correct troubleshooting path without guessing.

You can now identify why Copilot returns nothing after you submit a prompt. Start by refreshing the session and checking service health. If the issue persists, clear your browser cache and disable conflicting extensions. For recurring blank responses on mobile, offload and reinstall the Copilot app. Remember that content filters may silently drop long or policy-violating prompts, so split complex requests into shorter parts.