Non functioning "next" or "back" button in the last and first lessons

[sojo-gatoru]

Hi team - The page navigation buttons "next" and "back" are showing on the last & first page respectively, and they are clickable. But these are terminal pages. So these buttons must be disabled for clicking or removed altogether for these specific pages.

1. First-page lesson with clickable "back" button

2. Last page lesson with clickable "next" button

[These screenshot captures the darkening of button colors showing clickable]