Fatal error: Uncaught Error: Call to undefined function register_block_type() in /home/jaimieho/public_html/comm220/wp-content/plugins/pdfjs-viewer-shortcode/pdfjs-viewer.php:158 Stack trace: #0 /home/jaimieho/public_html/comm220/wp-includes/class-wp-hook.php(298): my_register_gutenberg_card_block('') #1 /home/jaimieho/public_html/comm220/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /home/jaimieho/public_html/comm220/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /home/jaimieho/public_html/comm220/wp-settings.php(449): do_action('init') #4 /home/jaimieho/public_html/comm220/wp-config.php(102): require_once('/home/jaimieho/...') #5 /home/jaimieho/public_html/comm220/wp-load.php(37): require_once('/home/jaimieho/...') #6 /home/jaimieho/public_html/comm220/wp-blog-header.php(13): require_once('/home/jaimieho/...') #7 /home/jaimieho/public_html/comm220/index.php(17): require('/home/jaimieho/...') #8 {main} thrown in /home/jaimieho/public_html/comm220/wp-content/plugins/pdfjs-viewer-shortcode/pdfjs-viewer.php on line 158