Unable to attach files in Gmail

Problem

When trying to do an attachment in Gmail you get the following error: Attachment failed.

Environment

  • Gmail web interface

Solution

You can try one of the following workarounds:
  • Check other browsers or use the incognito window.
  • Try a different network.
  • Make sure your internet provider is not blocking the following URL: 
mail-attachment.googleusercontent.com
  • Check your hardware and software.
Note: If you notice this issue is only happening to one user and using a specific device or network, this issue is related to a local issue.

Cause

Local environment issues like hardware, software or network.