Hi there! I understand you're seeing a "You cannot test right now" message after entering all your info and confirming the webcam works on the Ohio BMV Permit Practice Test app. Let's get this sorted out.

Could you tell me if this is your first attempt taking the test, or have you tried it before? Also, are you using a desktop or laptop with Windows 10, right? Sometimes, the system could block testing if there's a recent failed attempt or verification issue.

Here are some steps we can try to troubleshoot:

1. Check for multiple test attempts: Ohio BMV may require at least 24 hours between test attempts if verification fails. If you've tried recently, waiting a day might solve it.

2. Confirm device and browser compliance: You mentioned your device uses WebKit and runs Windows 10, which generally is supported. Just make sure you are using a supported desktop or laptop; mobile devices aren’t supported for this test.

3. Clear browser cache and cookies: Sometimes old data can interfere, so clearing cache might help.

4. Ensure webcam permissions are granted: Double-check your browser settings to allow webcam access to the test site.

5. Try another browser or system restart: Occasionally, browser glitches can block the test.

6. Check network connectivity: Make sure your internet connection is stable and no VPN or proxy is interfering.

If after these steps you still get the message with no reason given, it might be a server-side or account validation issue. In that case, contacting Ohio BMV directly or their tech support might be necessary.

Would you like me to walk you through clearing cache and checking webcam permissions first? Or is there any other detail you think might help?