Guide

1. Inside Buffer's Publish tab, find the post that contains the broken link preview and then click its 'Edit' button.

2. After that, navigate to the link attachment right below the caption and click its 'X' icon to delete the broken link preview.

3. Tap the text field, then paste the link anew. Make sure that it is copied directly from the actual address bar of the webpage to keep the preview intact.

4. Once done, click 'Save Draft' to apply the changes.

5. After completing these steps, the broken link preview in your Buffer post will be fixed instantly.