Debugging: Callback before_http_headers in local_mrooms component should be migrated to new hook callback for core\hook\output\before_http_headers in ./lib/moodlelib.php on line 7620. Stack trace:
line 7620 of ./lib/moodlelib.php: call to debugging()
line 7687 of ./lib/moodlelib.php: call to {closure}()
line 47 of ./lib/classes/hook/output/before_http_headers.php: call to get_plugins_with_function()
line 1388 of ./lib/outputrenderers.php: call to core\hook\output\before_http_headers->process_legacy_callbacks()
line ? of unknownfile: call to core_renderer->header()
line 2133 of ./lib/setuplib.php: call to call_user_func_array()
line 183 of ./login/agsm-ee/index.php: call to bootstrap_renderer->__call()
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