I found this error:
Notice: Undefined index: display_player_excerpt in /path/to/plugins/powerpress/powerpress.php on line 220
It only displays on excerpts.
They way I corrected it was to go to the settings and click save. Once I did this, the above mentioned index was written to the db.
I fixed the issue by adding:
to the if statement on line 220 of powerpress.php