Microsoft 365 Copilot is not working

Question

Microsoft 365 Copilot is not working

Hima Bindu Ravula 60 Microsoft Employee

How to fix M365 copilot issue "m365-copilot-app.m365copilot.errorPageTitlem365-copilot-app.m365copilot.serverErrorTitle(/): other side closedm365-copilot-app.m365copilot.errorPageText"

Jordan Springer 20 Reputation points

2026-06-11T20:14:15.0833333+00:00

App version 19.2606.39121.0 from the Microsoft Store released on June 11 2026 has caused this error when launching the app.

Quitting M365 Copilot from the system tray, then re-open M365 Copilot fixed the issue one time, but now I constantly get this error and the app no longer works at all.
Craig Pollok 5 Reputation points

2026-06-11T20:38:51.63+00:00

This error message is affecting my entire enterprise business of 250+ seats.

We use the paid m365 copilot in edge. I have cleared cache and restarted. Please advise.
Krit 15 Reputation points

2026-06-11T20:45:19.5066667+00:00

My suggestion to every one who has this problem is to use other devices, or if you use it on your PC just reinstall it.
Levi Johnson 10 Reputation points

2026-06-11T21:02:31.33+00:00

Just ran into this problem myself after trying to go into my Library in the M365 Copilot App. Assuming you're using the M365 CoPilot App try resetting it. Right Click M365 Copilot from the Start Menu/Applications List, select App Settings and scroll down to reset and reset the app. Mine said it failed trying to reset the app but it fixed it.

Hopefully it helps you out and others.
Kit Erceg 20 Reputation points

2026-06-11T21:37:46.5833333+00:00

It's a known MS issue now, they're rolling out a fix (revision to the previous build) currently according to CW1387674. Not sure why it took 8+ hours to identify the issue though!
Mercy, Paul 0 Reputation points

2026-06-11T21:37:55.7533333+00:00

Settings → Apps → M365 Copilot → Reset

There is also a repair option but this resolved the issue for me
Szeto, Alexander 5 Reputation points

2026-06-11T21:43:43.2966667+00:00

Hey everyone. I went on to this website and was able to log back into my account. I am a student though so I don't know if this can help everyone with the issue.

https://myapps.microsoft.com/student/
Jose Luis Campos Martinez 0 Reputation points

2026-06-11T21:46:16.81+00:00

Same issue: m365-copilot-app.m365copilot.errorPageTitlem365-copilot-app.m365copilot.serverErrorTitle(/): other side closedm365-copilot-app.m365copilot.errorPageText
patrick arnold 0 Reputation points

2026-07-01T00:05:53.08+00:00

Search for "JESUS and CARRHEA" Carrhea was a significant Battle betwixt Roman and Parthian forces in 53 BC/BCE Jesus of Nazareth was a wise man of the first century AD/CE. His home territory was western and northern Galillee. Jesus was born approximately fifty years after the battle of Carrhae. Copilot search measured time distance as over a millennium. Actually, they were within a normal life span. Much of Jesus territory was within 400 miles from site of Battle of Carrhae. This was significant episode in tensions betwixt Roman and Parthian Empires. The tensions betwixt these two empires had real effects on political mentality of first century Syria/Judea Co-pilot was in error

3 answers

Your answer

Jordan Springer 20 Reputation points

2026-06-11T20:14:15.0833333+00:00

App version 19.2606.39121.0 from the Microsoft Store released on June 11 2026 has caused this error when launching the app.

Quitting M365 Copilot from the system tray, then re-open M365 Copilot fixed the issue one time, but now I constantly get this error and the app no longer works at all.
Craig Pollok 5 Reputation points

2026-06-11T20:38:51.63+00:00

This error message is affecting my entire enterprise business of 250+ seats.

We use the paid m365 copilot in edge. I have cleared cache and restarted. Please advise.
Krit 15 Reputation points

2026-06-11T20:45:19.5066667+00:00

My suggestion to every one who has this problem is to use other devices, or if you use it on your PC just reinstall it.
Levi Johnson 10 Reputation points

2026-06-11T21:02:31.33+00:00

Just ran into this problem myself after trying to go into my Library in the M365 Copilot App. Assuming you're using the M365 CoPilot App try resetting it. Right Click M365 Copilot from the Start Menu/Applications List, select App Settings and scroll down to reset and reset the app. Mine said it failed trying to reset the app but it fixed it.

Hopefully it helps you out and others.
Kit Erceg 20 Reputation points

2026-06-11T21:37:46.5833333+00:00

It's a known MS issue now, they're rolling out a fix (revision to the previous build) currently according to CW1387674. Not sure why it took 8+ hours to identify the issue though!
Mercy, Paul 0 Reputation points

2026-06-11T21:37:55.7533333+00:00

Settings → Apps → M365 Copilot → Reset

There is also a repair option but this resolved the issue for me
Szeto, Alexander 5 Reputation points

2026-06-11T21:43:43.2966667+00:00

Hey everyone. I went on to this website and was able to log back into my account. I am a student though so I don't know if this can help everyone with the issue.

https://myapps.microsoft.com/student/
Jose Luis Campos Martinez 0 Reputation points

2026-06-11T21:46:16.81+00:00

Same issue: m365-copilot-app.m365copilot.errorPageTitlem365-copilot-app.m365copilot.serverErrorTitle(/): other side closedm365-copilot-app.m365copilot.errorPageText
patrick arnold 0 Reputation points

2026-07-01T00:05:53.08+00:00

Search for "JESUS and CARRHEA" Carrhea was a significant Battle betwixt Roman and Parthian forces in 53 BC/BCE Jesus of Nazareth was a wise man of the first century AD/CE. His home territory was western and northern Galillee. Jesus was born approximately fifty years after the battle of Carrhae. Copilot search measured time distance as over a millennium. Actually, they were within a normal life span. Much of Jesus territory was within 400 miles from site of Battle of Carrhae. This was significant episode in tensions betwixt Roman and Parthian Empires. The tensions betwixt these two empires had real effects on political mentality of first century Syria/Judea Co-pilot was in error

Answer 1

Killian N 3,310 Independent Advisor

Hi @Hima Bindu Ravula,

From what you’ve described, this kind of error is often linked to temporary session, authentication, or browser-related issues. With that in mind, you may want to try the steps below to see if they help resolve the problem:

1/ Try using an InPrivate / Incognito window:

To begin with, please open a private browsing session (Edge InPrivate or Chrome Incognito), then access Microsoft 365 Copilot again and check whether the issue still occurs.

2/ Sign out and sign back in:

In addition, I recommend signing out of your Microsoft 365 account completely. After that, close all browser windows, reopen your browser, and sign in again to refresh your session.

3/ Clear browser cache and cookies:

Sometimes, outdated or corrupted cache data can cause issues like this. Therefore, clearing your browser’s cache and cookies may help reset things.

4/ Try a different browser:

You could also try accessing Copilot from another browser. For example, if you’re currently using Chrome, switching to Microsoft Edge (which is optimized for Microsoft 365) might make a difference.

5/ Check your network connection:

Lastly, if you’re connected to a corporate network or using a VPN, it might be worth testing on a different network. This can help rule out any connectivity or firewall restrictions.

I hope these steps help improve the situation. If the issue persists, please feel free to share any updates, and I’ll be more than happy to continue assisting you.

Looking forward to your response.

If the answer is helpful, click on "Accept Answer" and please vote positively. If you have additional questions about this answer, click on "Comment".

Note: Follow the steps in our documentation to enable email notifications if you want to receive the email notification related to this thread.

Krit 15 Reputation points

2026-06-11T20:27:04.51+00:00

Yeah no, it's the update it self. It doesn't work on different browser, has nothing to do with connections, clearing browser or cache does not do anything, it's not possible to sign out unless reinstalling, and it still shows up the same for incognito. This is coding error for sure on their side, someone messed it up on the server side.
Anonymous

2026-06-11T20:52:22.8133333+00:00

Yup same here. Tried Windows app, exited from taskbar, ended process on Task Manager, tried on Microsoft Edge browser... this is a quality control failure, wow
Javier Peraza 5 Reputation points

2026-06-11T20:57:04.5966667+00:00

Not working
Jhony Alejandro Rivera 5 Reputation points

2026-06-11T21:01:39.5266667+00:00

No working, error.
Doreen Leaf 5 Reputation points

2026-06-11T21:04:31.0866667+00:00

It's kinda hard to "sign out and back in" when I can't even get into the app to do it. I can't get past that error message. Please fix. My business depends on having access to M365
St Sauver, Ashley 0 Reputation points

2026-06-11T21:04:38.5033333+00:00

As someone in the middle of BAR prep and my outlines are saved on your system... Trust me, I tried. It's your update... It was working this morning.
Monzon, Rosemarie A 5 Reputation points

2026-06-11T21:06:35.9866667+00:00

Not working
MMMMMM 5 Reputation points

2026-06-11T21:38:50.0766667+00:00

Tried all of the above. Same error each time. New update seems to have broken my access to copilot.
Killian N 3,310 Reputation points Independent Advisor

2026-06-22T09:27:51.64+00:00

Hi everyone,

I wanted to share a quick update regarding the issue you experienced earlier.

From what I’ve been able to gather, this behavior was related to a Microsoft service incident affecting Microsoft 365 Copilot Chat (Issue ID: CW1391746). During that time, some users couldn’t submit prompts and instead saw the message “Something went wrong.” In other cases, Copilot would start generating a response, but then it would disappear and show the same error.

The issue began on June 12, 2026, and appears to have been caused by a recent service update. Because of that, Microsoft rolled the service back to a previously stable version, and after validating the fix, they continued applying it across the affected systems.

For your reference: Service health - Microsoft 365 admin center

Note: Access is limited to Microsoft 365 Global Administrator. Please contact your IT admin if you don’t have access.

Now that the incident has been resolved, the service should be back to normal. Please feel free to try again and use Copilot as you usually would.

If you still run into any problems, just let me know and I’ll do my best to help.

Thanks so much for your patience while this was being worked through.

Answer 2

Szeto, Alexander 5

Hey everyone. I went on to this website and was able to log back into my account. I am a student though so I don't know if this can help everyone with the issue.

https://myapps.microsoft.com/student/

0 comments

Answer 3

DeNee Logan 0

need help to restore copilot to my outlook email as I am getting an message I no long have copilot. I also just installed the premium subscription for my new dell laptop

0 comments