Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "_wp_footnotes_kses_init" not found or invalid function name in /var/www/vhosts/teknika.ch/httpdocs/wp-includes/class-wp-hook.php:307
Stack trace:
#0 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#1 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#2 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/pluggable.php(48): do_action('set_current_use...')
#3 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/user.php(3573): wp_set_current_user(0)
#4 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/pluggable.php(70): _wp_get_current_user()
#5 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/pluggable.php(1148): wp_get_current_user()
#6 /var/www/vhosts/teknika.ch/httpdocs/wp-content/plugins/elementor-pro/plugin.php(494): is_user_logged_in()
#7 /var/www/vhosts/teknika.ch/httpdocs/wp-content/plugins/elementor-pro/plugin.php(139): ElementorPro\Plugin->__construct()
#8 /var/www/vhosts/teknika.ch/httpdocs/wp-content/plugins/elementor-pro/plugin.php(528): ElementorPro\Plugin::instance()
#9 /var/www/vhosts/teknika.ch/httpdocs/wp-content/plugins/elementor-pro/elementor-pro.php(68): require('/var/www/vhosts...')
#10 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/class-wp-hook.php(307): elementor_pro_load_plugin('')
#11 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#12 /var/www/vhosts/teknika.ch/httpdocs/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#13 /var/www/vhosts/teknika.ch/httpdocs/wp-settings.php(461): do_action('plugins_loaded')
#14 /var/www/vhosts/teknika.ch/httpdocs/wp-config.php(67): require_once('/var/www/vhosts...')
#15 /var/www/vhosts/teknika.ch/httpdocs/wp-load.php(50): require_once('/var/www/vhosts...')
#16 /var/www/vhosts/teknika.ch/httpdocs/wp-blog-header.php(13): require_once('/var/www/vhosts...')
#17 /var/www/vhosts/teknika.ch/httpdocs/index.php(17): require('/var/www/vhosts...')
#18 {main}
  thrown in /var/www/vhosts/teknika.ch/httpdocs/wp-includes/class-wp-hook.php on line 307