I cannot finish the Teachable course. It appears "locked" and won't allow me to progress forward.

Hey Mohamed. It's been a while since going through the course, but I recall encountering something like this as well. I'd try re-watching the video and make sure each one shows as completed. For me, I think the issue is for some of the lesson videos I'd watch them at 1.5X or 2X speed, and it didn't seem to think I finished the lesson unless I went through it at 1X speed so that it would show as completed.

Your situation may be different, but it may help you to move forward.

first of all you have to complete the previous content. just don't skip the content you have to watch everything