Thursday March 25, 2021


Email verification sign in error for SSO users

Issue summary:
On March 24, 2021 around 1:08 p.m. to 6:41 p.m. PDT on March 25, 2021, some users could've encountered "There's been a glitch" when trying to open workspaces with single sign-on (SSO) enabled.

This error page appeared when using the email verification flow to sign in, where users are directed to their accounts after receiving confirmation emails. Affected users could still access their accounts by entering the workspace URLs, such as in a browser address bar, instead of using email verification.

We discovered that a change we made caused this trouble, so we deployed a fix to resolve this for affected users.

5:14 PM PST

We've resolved the email verification sign in issue, and everyone should be able to sign in as expected once again. Apologies for the disruption, we appreciate your patience as we worked to fix this.

6:47 PM PST

We’ve deployed a change that we believe will rectify the email verification issue, although we’re still monitoring the situation closely. We’ll post an update as soon as we can confirm the problem is resolved.

5:58 PM PST

We're working as fast as we can to get the potential fix out. We'll share another update in 30 minutes.

5:26 PM PST

We’ve isolated the problem and we’re focused on getting Slack working again as soon as possible. We’ll have another update shortly.

4:51 PM PST

We’re getting closer to the root of the sign in issue, and and we’re working on getting a fix out as soon as possible. We’ll be back with another update shortly.

4:21 PM PST

Our team have now begun exploring a possible fix for the sign in issue, and we'll be returning with new developments on our progress as they happen.

3:52 PM PST

No additional news to share just yet, but we’re focused on getting things back to normal as quickly as we can. We’ll be back with another update in 30 minutes.

3:21 PM PST

Our investigation of the email verification sign in glitch is still ongoing at this time. We’ll be back with another update as soon as we have news.

2:51 PM PST

Some SSO users may be running into a "There's been a glitch" error screen when logging in using the email verification sign in method. In the meantime, manually entering the workspace URL in your browser address bar and then signing in should work as normal. Our team are investigating, and will share updates as soon as they are available.

2:21 PM PST

Services affected





Trouble searching in Slack

Issue summary:
On March 25, 2021 from 4:58 a.m. to 6.14 a.m. PDT, some users were unable to search in Slack as expected. Affected users might've encountered a low number of search results or an error after searching.

We discovered traffic to some servers caused them to be overloaded, which meant some search queries didn't resolve as they should. We restarted the impacted servers to remediate the issue.

5:31 PM PST

The trouble with search should now be resolved. Please try reloading Slack (press Command/Control + Shift + R).

Should you run into any issue, please contact us at

Note: We've updated the title here to be more descriptive.

6:53 AM PST

Some users are experiencing issues with our search feature. We're working hard to resolve the issue as quickly as possible, and we'll update you as soon as we have more information.

We're very sorry for any inconvenience caused.

5:46 AM PST

Services affected