Error encountered moodle 4.1 PHP 8.1

[katcher]

Encountered the following error when attempting to use the plugin:

PHP Notice: Exception encountered in event observer '\local_course_template\observers::course_created': Backup is missing XML file: /data/moodledata/temp/backup//4017/course/filters.xml

• line 181 of /backup/util/plan/base_task.class.php: call to restore_structure_step->execute()
• line 191 of /backup/util/plan/base_plan.class.php: call to base_task->execute()
• line 168 of /backup/util/plan/restore_plan.class.php: call to base_plan->execute()
• line 408 of /backup/controller/restore_controller.class.php: call to restore_plan->execute()
• line 156 of /local/course_template/classes/backup.php: call to restore_controller->execute_plan()
• line 56 of /local/course_template/classes/helper.php: call to local_course_template\backup::restore_backup()
• line 51 of /local/course_template/classes/observers.php: call to local_course_template\helper::template_course()
• line ? of unknownfile: call to local_course_template\observers::course_created()
• line 155 of /lib/classes/event/manager.php: call to call_user_func()
• line 75 of /lib/classes/event/manager.php: call to core\event\manager::process_buffers()
• line 835 of /lib/classes/event/base.php: call to core\event\manager::dispatch()
• line 2282 of /course/lib.php: call to core\event\base->trigger()
• line 167 of /course/edit.php: call to create_course()

in /public/home/lib/weblib.php on line 3341, referer: https://moodle4-dev.xxx.xx/course/edit.php?category=0

[katcher]

Just attempted to perform a backup with filters selected and it worked. Is there a requirement for backing up filters for the plugin to function?