Hi there! I see you're encountering Big Ten Plus app error 207 along with a message about a missing end-user IP address. I'd like to help you get this sorted out.

To start, can you tell me where you're seeing this error? Is it happening when you try to log in, start streaming, or at another point? Also, is this on the Big Ten Plus website or the app on your device?

Knowing this will help me guide you with the best steps. In the meantime, error 207 often relates to network connection issues or a failure for the service to properly identify your IP address, which is crucial for streaming authorization.

Once you confirm, here are some initial steps we can try:

1. Check your internet connection: Make sure it's stable and working well. Sometimes, resetting your router/modem can help.

2. Log out and log back in: This can refresh your session and might resolve the issue.

3. Clear browser cache and cookies (if using the website): This removes old data that might interfere.

4. Use a different browser or incognito/private mode: This tests if browser settings/extensions are causing issues.

5. Update the app and your Windows 10 system: Ensure you have the latest versions.

6. Restart your device: Clears any temporary glitches.

If you’ve already tried these, let me know, and we can go deeper into network settings or other potential causes.

Also, does this error happen on multiple devices or just one? That info can help narrow down whether it’s your device or something with your account or network.

Looking forward to your details!