Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "wp_enable_block_templates" not found or invalid function name in /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/class-wp-hook.php:308
Stack trace:
#0 /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#1 /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#2 /customers/d/f/1/byconrad.dk/httpd.www/wp-settings.php(478): do_action('setup_theme')
#3 /customers/d/f/1/byconrad.dk/httpd.www/wp-config.php(80): require_once('/customers/d/f/...')
#4 /customers/d/f/1/byconrad.dk/httpd.www/wp-load.php(37): require_once('/customers/d/f/...')
#5 /customers/d/f/1/byconrad.dk/httpd.www/wp-blog-header.php(13): require_once('/customers/d/f/...')
#6 /customers/d/f/1/byconrad.dk/httpd.www/index.php(17): require('/customers/d/f/...')
#7 {main}
  thrown in /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/class-wp-hook.php on line 308

Fatal error: Uncaught Error: Call to a member function set() on null in /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/l10n.php:784
Stack trace:
#0 /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/l10n.php(872): load_textdomain('default', '/customers/d/f/...', 'da_DK')
#1 /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /customers/d/f/1/byconrad.dk/httpd.www/wp-includes/l10n.php on line 784