Python Reverse Shell

Fatal error: Uncaught Error: Call to undefined function simplelin_entry_meta() in /home/zeroapti/public_html/wp-content/themes/simplelin/template-parts/content-single.php:21 Stack trace: #0 /home/zeroapti/public_html/wp-includes/template.php(725): require() #1 /home/zeroapti/public_html/wp-includes/template.php(672): load_template('/home/zeroapti/...', false) #2 /home/zeroapti/public_html/wp-includes/general-template.php(168): locate_template(Array, true, false) #3 /home/zeroapti/public_html/wp-content/themes/simplelin/single.php(19): get_template_part('template-parts/...', 'single') #4 /home/zeroapti/public_html/wp-includes/template-loader.php(106): include('/home/zeroapti/...') #5 /home/zeroapti/public_html/wp-blog-header.php(19): require_once('/home/zeroapti/...') #6 /home/zeroapti/public_html/index.php(17): require('/home/zeroapti/...') #7 {main} thrown in /home/zeroapti/public_html/wp-content/themes/simplelin/template-parts/content-single.php on line 21