When I play the third Steinitz mastergame and click on "Go to the next lesson" after I complete the 3. Lesson of the Mastergame, I never get to the 4. last lesson instead I get kicked out to the main page of Master games. So I never get to see the last 4. lesson and finish the course of the 3. Mastergame...
There are lots of lessons featuring Steinitz.

Can you be more specific about which one you are talking about?
When I play the third Steinitz mastergame and click on "Go to the next lesson" after I complete the 3. Lesson of the Mastergame, I never get to the 4. last lesson instead I get kicked out to the main page of Master games. So I never get to see the last 4. lesson and finish the course of the 3. Mastergame...