Hello! I understand you had a 21:30 class that you conducted, but the Lesson Memo is not letting you record it, correct? Let me help you sort this out.

First, just to confirm:
- Did you successfully complete the class at 21:30 through the 51Talk app?
- Have you tried to make the Lesson Memo immediately after the class or is it showing as locked/unavailable?
- Are you seeing any error messages when attempting to submit the Lesson Memo?

This info will help me guide you better. In general, some common reasons why the Lesson Memo may not be available include system delays, network issues during saving, or timing glitches in the system recognizing your completed session.

Here’s a step-by-step troubleshooting plan we can try:

1. Refresh and Relogin:
Log out of the 51Talk app completely, then log back in to refresh your session. Sometimes the system just needs a refresh to update your lesson status.

2. Check Your Internet Connection:
Ensure your internet connection is stable. Since you're on Windows 10 with WebKit browser, try switching to a wired connection or a more stable Wi-Fi, if possible, and then reload the memo page.

3. Clear Cache and Cookies in the Browser:
Web browsers can sometimes cache old data that prevents the Lesson Memo from updating. In your WebKit browser, clear the cache and cookies, then try again.

4. Access the Memo from Another Device or Browser:
If possible, try logging into your 51Talk teacher account from a different browser or device to see if the memo is accessible there.

5. Check the Memo Deadlines and Time Settings:
Confirm that the class time matches the system time on your device, as time discrepancies might prevent memo submission. Also, ensure you are within the memo submission window—usually you have a deadline when memos must be submitted.

6. Look for Recorded Lesson Videos:
If the lesson recording is missing or not synced properly, the Lesson Memo might not be available. Check if the system recorded your class (some guides show how to check recorded lessons) and report if missing.

If these steps don’t fix the problem, sometimes the issue requires backend verification from 51Talk support, especially if it's related to system glitches marking the class as “not conducted.” You can prepare a screenshot of your attempted memo and class schedule to send when escalating.

Would you like me to walk you through any of these steps? Or perhaps check if there are any ongoing issues with Lesson Memo submissions for 21:30 classes today?

Are you satisfied with the solution I provided so far?