Wednesday February 3, 2021


A small number of users encountering a blank screen in the desktop app

Issue summary:
On February 2, 2021 from around 12:49 p.m. PST to February 3, 2021, 4:49 p.m. PST, some customers may have been stuck on blank screens in the desktop app. This was specific to older versions of Slack, particularly version 4.2.0 and older.

A recent code change altered the information that Slack looks for during launch. This inadvertently caused issues for older versions of Slack, leaving them stuck on a blank page after attempting a cold boot without that information.

We deployed a fix that changed the information that Slack looks for during launch and prevented older versions of the app from immediately cold booting, resolving the issue for all versions of the app.

9:07 PM PST

We've released a fix for this issue. Any users still being affected should be able to get things working again by clearing their cache or updating the desktop app.

We apologize for the disruption to your day, and we'll be back to share a summary shortly.

1:44 PM PST

Some users accessing Slack on previous versions of the desktop application, such as 4.1.0 and 4.2.0, may be stuck on a blank screen. We're working to resolve this, and we apologize for the trouble.

At this time, updating the desktop application or clearing cache should resolve the issue.

If you have an internal team who manages updates, please reach out to them for assistance with updating. You can find the steps to update here:

If you can access the Help menu in the top menu bar, please select Help, Troubleshooting, then Clear Cache to clear the cache. If you cannot access the Help menu, please let us know at so we can assist.

10:56 AM PST

Services affected