How can I run a function when a course module is added or updated in moodle?

I try to add observers on course_module_updated and course_module_created
but not triggered any of my Triggering ways

I tried:
Purge all caches. — not work
log to file. — not work
log to database. — not work
die() — not work

Is my code has wrong ?

Is the event triggered but log code not work

db/events.php

defined('MOODLE_INTERNAL') || die();
use moodle_local_plugineventevents_observer;


$observers = [
    [
        'eventname' => 'coreeventcourse_module_updated',
        'callback' => 'events_observer::course_module_updated',
        'includefile' => null,
        'internal' => true,
        'priority' => 9999
    ],
    [
        'eventname' => 'coreeventcourse_module_created',
        'callback' => 'events_observer::course_module_updated',
        'includefile' => null,
        'internal' => true,
        'priority' => 9999
    ],
];

classes/event/observer.php

namespace moodle_local_pluginevent;

defined('MOODLE_INTERNAL') || die();

class events_observer
{
    /**
     * Triggered when 'course_module_updated' event is triggered.
     *
     * @param coreeventcourse_module_updated $event
     * @return bool
     */
    public static function course_module_updated(coreeventcourse_module_updated $event)
    {
        global $DB, $CFG;
        // Log to DB
        $logdata = new stdClass();
        $logdata->eventname = $event->eventname;
        $logdata->component = 'local_course_editor';
        $logdata->action = 'updated';
        $logdata->target = 'course_module';
        $logdata->objectid = $event->objectid;
        $logdata->timecreated = time();

        $DB->insert_record('log', $logdata);


        // Log the event data to a file

        $logfile = $CFG->dirroot . '/local/moodle_local_plugin/log.txt';
        $timestamp = date('Y-m-d H:i:s');
        $eventData = json_encode($event->get_data(), JSON_PRETTY_PRINT);
        $logMessage = "[{$timestamp}] Course module updated:n{$eventData}nn";

        file_put_contents($logfile, $logMessage, FILE_APPEND);

        // end
        die(var_dump($event));
        //   return true;
    }
}

Can any one help me with that ?

Thanks!