Activating "default to all events" addon in Events+ causes Server Error 500

I'm using Events+ and my goal is to display all upcoming events on my events page. I made a custom template for it (code as plaintext below). Right now it's only showing events from this current month, not future events from next month or any month thereafter.

I found a thread in the community forum that suggested enabling the "Default to all events" addon. I did that and after activating it, my events page gives a 500 Internal error.

Events page:
Plain-text of code for this theme page: (file is located in the theme directory under filename "archive-incsub_event.php"

I'm currently downloading the php error_log from our server now. I will update with info from that soon.