Fatal error: Uncaught ArgumentCountError: Too few arguments to function meplan_show_header(), 0 passed in /homepages/43/d719367990/htdocs/app739245119/wp-content/themes/mp/single.php on line 21 and exactly 1 expected in /homepages/43/d719367990/htdocs/app739245119/wp-content/themes/mp/inc/functions.php:6 Stack trace: #0 /homepages/43/d719367990/htdocs/app739245119/wp-content/themes/mp/single.php(21): meplan_show_header() #1 /homepages/43/d719367990/htdocs/app739245119/wp-includes/template-loader.php(78): include('/homepages/43/d...') #2 /homepages/43/d719367990/htdocs/app739245119/wp-blog-header.php(19): require_once('/homepages/43/d...') #3 /homepages/43/d719367990/htdocs/app739245119/index.php(17): require('/homepages/43/d...') #4 {main} thrown in /homepages/43/d719367990/htdocs/app739245119/wp-content/themes/mp/inc/functions.php on line 6