Welcome Jeanette,
I'm sorry you're having trouble with the Copilot chat bar.
To help narrow this down, could you confirm whether you are signed in with a personal Microsoft account (such as Outlook.com, Hotmail.com, or Live.com) or a work/school account?
In the meantime, please try these quick checks:
- Open Copilot in an InPrivate/Incognito browser window and sign in again.
- Temporarily disable any ad blockers, tracking blockers, VPNs, or security extensions, then refresh the page.
- Clear the browser cache and cookies for Copilot, then sign back in.
- Try accessing Copilot from a different browser to see whether the same red blocked icon appears.
If the answer is helpful, please click "Yes". If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.