Fatal error: Uncaught Error: Call to undefined function twenty_twenty_one_the_posts_navigation() in /home/xs169798/sfl.or.jp/public_html/wp-content/themes/sfl/archive.php:31
Stack trace:
#0 /home/xs169798/sfl.or.jp/public_html/wp-includes/template-loader.php(106): include()
#1 /home/xs169798/sfl.or.jp/public_html/wp-blog-header.php(19): require_once('/home/xs169798/...')
#2 /home/xs169798/sfl.or.jp/public_html/index.php(17): require('/home/xs169798/...')
#3 {main}
thrown in /home/xs169798/sfl.or.jp/public_html/wp-content/themes/sfl/archive.php on line 31