Unable to Attach Files on Composition Cloud

Summary

Upon attaching a file on the tabs macro, the process continuously spins in Uploading files state. 

Environment

  • Confluence and Composition Cloud

  • Firefox Browser version 78.x or bellow

Cause

This is due to an older version of Firefox (For example: Firefox 68.7esr).

Resolution

Please upgrade to the latest Firefox version 78.0 or later