Hi there! I understand that you and your friend are unable to call each other on CooMeet. Let's see if we can get this sorted out for you.

To help me better assist you, could you please share a bit more about the issue? For example:
- Are you trying to make calls through the CooMeet website or an app?
- Do you see any error messages when attempting to call?
- Have either of you checked if your internet connections are stable?
- Are both of you logged into your accounts properly, and do you have the necessary permissions or subscriptions enabled?

In the meantime, here are a few basic steps you can try to troubleshoot the calling issue:

1. Check internet connection: Make sure both you and your friend have stable internet. CooMeet requires a decent connection for smooth video calls.
2. Browser and device requirements: Since you use WebKit on Windows 10, please ensure your browser is up to date for full compatibility. Sometimes outdated browsers can cause call failures.
3. Permissions: Confirm that the browser has permission to access your microphone and camera. This is vital for calls to work.
4. Refresh and relogin: Log out of CooMeet, clear your browser cache, and then log back in. Sometimes sessions get stuck, and refreshing helps.
5. Try an alternative browser: If possible, switch to another compatible browser like Chrome or Firefox temporarily to test calls.

Could you try these and let me know if any changes occur? Also, if there’s any specific error or behavior you notice, that info would be helpful to dig deeper.

Looking forward to your reply!