When running with Moodle 4.4 with debugging set to developer the following error is shown:
Callback before_standard_top_of_body_html in auth_outage component should be migrated to new hook callback for core\hook\output\before_standard_top_of_body_html_generation
When running with Moodle 4.4 with debugging set to developer the following error is shown:
Callback before_standard_top_of_body_html in auth_outage component should be migrated to new hook callback for core\hook\output\before_standard_top_of_body_html_generation
From Moodle 4.4 a new Hooks API should be used: https://moodledev.io/docs/4.4/apis/core/hooks