[quentro]

To resolve this issue, Open and edit file at /plugins/boss-learndash/templates/learndash-buddypress/buddypress-group-single.php

Replace line #116 with the next line.

printf( _n( '%s '.LearnDash_Custom_Label::get_label( 'lesson' ), '%s '.LearnDash_Custom_Label::get_label( 'lessons' ), count($total_lessons), 'boss-learndash' ), count($total_lessons) );

[quentro]

Having exactly the same issue with Social Learner. The theme seems to have a lot of smaller bugs…

Haven’t found a proper solution for this bug.