Fatal error: Uncaught Error: Call to undefined function add_action() in /home/clients/4a79f3cc68f2e7912a2c302771ded80e/web/diwan_nl/wp-includes/functions.php:6152 Stack trace: #0 /home/clients/4a79f3cc68f2e7912a2c302771ded80e/web/diwan_nl/wp-load.php(54): require_once() #1 /home/clients/4a79f3cc68f2e7912a2c302771ded80e/web/diwan_nl/wp-blog-header.php(13): require_once('/home/clients/4...') #2 /home/clients/4a79f3cc68f2e7912a2c302771ded80e/web/diwan_nl/index.php(20): require('/home/clients/4...') #3 {main} thrown in /home/clients/4a79f3cc68f2e7912a2c302771ded80e/web/diwan_nl/wp-includes/functions.php on line 6152