RSS Feeds by timeline not working

The RSS Feeds by Timeline (Outline) are not working

/m/timeline/rss/owner/88/

Error:

Warning: Undefined array key 1 in /home/secutan5/public_html/inc/utils.inc.php on line 1418

Warning: Cannot modify header information - headers already sent by (output started at /home/secutan5/public_html/inc/utils.inc.php:1418) in /home/secutan5/public_html/modules/boonex/timeline/classes/BxTimelineModule.php on line 795

Ξx¢ΞL Timeline RSSΞx¢ΞL hat eine Profilcover]]>Wed, 13 Jul 2022 02:58:27 GMTΞx¢ΞL fügte Ein Eintrag]]>Fri, 24 Jun 2022 21:20:17 GMTΞx¢ΞL fügte Ein Eintrag]]>Thu, 23 Jun 2022 18:52:31 GMTΞx¢ΞL fügte ein Album hinzu]]>Wed, 15 Jun 2022 11:28:28 GMT