Missing Next lesson button (Lesson 5)

[TomRvr]

Hello !

LESSON : 5
CHAPTER : 15
BUG :
The Next lesson button is missing to go from lesson 5 to lesson 6.
See at the bottom of the picture below.

I'd love to help fixing this but I might need a bit of help to know where to look.

[RH-sdavey]

Following up on this, the element is present...

But it has style attribute display:none, once that is removed the button is visible,

Ive tried to find where this button is being styled, but no success... just FYI @devs