Thank you for noticing us about this bug. We are updating our script. as well as you can fix it easily.
Please follow below steps.
/root/app/Http/Controllers/CampaignsController.php line number 184
find this line
$enable_discuss = get_option('enable_disqus_comment_in_blog');
and replace above line with
$enable_discuss = get_option('enable_disqus_comment');
Hopefully, your issue will be fixed.