How to Fix “Notifications Not Working” in Slack (2026 Guide)

The Short Answer

To fix notifications not working in Slack, advanced users can try toggling off the “Do Not Disturb” mode and then restarting the Slack application, which can resolve the issue in under 30 seconds. Additionally, checking the OS-level permission settings for Slack can help identify and resolve any permission blocks that may be causing the issue.

Why This Error Happens

  • Reason 1: The most common cause of notifications not working in Slack is the “Do Not Disturb” mode being enabled, which can silence notifications for a set period of time or indefinitely. This feature is designed to help users focus or avoid distractions during certain hours, but it can sometimes be enabled accidentally.
  • Reason 2: An edge case cause of this issue is OS-level permission blocks, where the operating system restricts Slack from sending notifications due to permission settings. This can occur when a user has previously denied Slack permission to send notifications or when the system has automatically blocked notifications from Slack.
  • Impact: The impact of notifications not working in Slack can be significant, resulting in missed messages, delayed responses, and decreased productivity. In a typical team setting, this can lead to misunderstandings, miscommunications, and errors, ultimately affecting the team’s overall performance and efficiency.

Step-by-Step Solutions

Method 1: The Quick Fix

  1. Go to Settings > Notifications > Do Not Disturb
  2. Toggle Do Not Disturb to Off
  3. Refresh the Slack page or restart the application to apply the changes.

Method 2: The Command Line/Advanced Fix

For users experiencing OS-level permission blocks, the following steps can be taken:

  • On macOS, go to System Preferences > Notifications & Focus > Notifications, and ensure that Slack is allowed to send notifications.
  • On Windows, go to Settings > System > Notifications & actions, and ensure that Slack is allowed to send notifications.
  • On Linux, run the command sudo chmod +x /path/to/slack to grant execution permissions to the Slack application, and then restart Slack.

Prevention: How to Stop This Coming Back

To prevent notifications from being blocked in the future, it’s essential to:

  • Regularly review and update OS-level permission settings for Slack
  • Ensure that the “Do Not Disturb” mode is only enabled when necessary
  • Monitor system logs for any errors or warnings related to Slack notifications
  • Keep the Slack application up-to-date with the latest version, as newer versions often include bug fixes and improvements for notification handling.

If You Can’t Fix It…

[!WARNING] If Slack keeps crashing or notifications continue to not work after attempting the above fixes, consider switching to Microsoft Teams which handles OS-level permission blocks natively without these errors. However, this should be a last resort, as switching platforms can be time-consuming and may require significant adjustments.

FAQ

Q: Will I lose data fixing this? A: No, fixing the notifications issue in Slack will not result in any data loss. The fixes provided above only modify settings and permissions, without affecting any existing data or messages.

Q: Is this a bug in Slack? A: The notifications not working issue is not a bug in Slack, but rather a feature or setting that can be misconfigured or blocked by the operating system. Slack has a history of regularly updating its application to improve notification handling, with version 4.23.0 and later including significant improvements to notification reliability and customization options.

📚 Continue Learning

Check out our guides on Slack and Notifications Not Working.