E_NOTICE [8]: Trying to get property 'ID' of non-object
Zeile 42 in der Datei /mnt/web207/a0/84/58687584/htdocs/wp-content/themes/brahms/header.php, PHP 7.4.33 (Linux)
#0  ifsErrorHandler() called at [/mnt/web207/a0/84/58687584/htdocs/wp-content/themes/brahms/header.php:42]
#1  require_once(/mnt/web207/a0/84/58687584/htdocs/wp-content/themes/brahms/header.php) called at [/mnt/web207/a0/84/58687584/htdocs/wp-includes/template.php:790]
#2  load_template() called at [/mnt/web207/a0/84/58687584/htdocs/wp-includes/template.php:725]
#3  locate_template() called at [/mnt/web207/a0/84/58687584/htdocs/wp-includes/general-template.php:48]
#4  get_header() called at [/mnt/web207/a0/84/58687584/htdocs/wp-content/themes/brahms/404.php:13]
#5  include(/mnt/web207/a0/84/58687584/htdocs/wp-content/themes/brahms/404.php) called at [/mnt/web207/a0/84/58687584/htdocs/wp-includes/template-loader.php:106]
#6  require_once(/mnt/web207/a0/84/58687584/htdocs/wp-includes/template-loader.php) called at [/mnt/web207/a0/84/58687584/htdocs/wp-blog-header.php:19]
#7  require(/mnt/web207/a0/84/58687584/htdocs/wp-blog-header.php) called at [/mnt/web207/a0/84/58687584/htdocs/index.php:17]