[07-Jan-2020 20:00:03 UTC] Default exception handler: Site is being upgraded, please retry later. Debug: 
Error code: upgraderunning
* line 503 of /lib/setuplib.php: moodle_exception thrown
* line 679 of /lib/setup.php: call to print_error()
* line 27 of /config.php: call to require_once()
* line 33 of /admin/cli/cron.php: call to require()

