Fatal error: Uncaught Error: Call to undefined function projectiinvictus_is_lesson_post_type() in /home/projectinvictus/public_html/wp-content/themes/projectinvictus/single.php:13 Stack trace: #0 /home/projectinvictus/public_html/wp-includes/template-loader.php(74): include() #1 /home/projectinvictus/public_html/wp-blog-header.php(19): require_once('/home/projectin...') #2 /home/projectinvictus/public_html/index.php(17): require('/home/projectin...') #3 {main} thrown in /home/projectinvictus/public_html/wp-content/themes/projectinvictus/single.php on line 13