GLOBALS:

Array
(
    [_GET] => Array
        (
            [route] => courses/php7-i-mysql-sredniy-uroven/урок-17/memcache-opcache
            [_module] => courses
            [_page] => lesson
            [key] => php7-i-mysql-sredniy-uroven
            [id] => урок-17
            [title] => memcache-opcache
        )

    [_POST] => Array
        (
        )

    [_COOKIE] => Array
        (
        )

    [_FILES] => Array
        (
        )

    [_SERVER] => Array
        (
            [REDIRECT_UNIQUE_ID] => YH4fd7I52n8AAAyEQW4AAABj
            [REDIRECT_HTTPS] => on
            [REDIRECT_SSL_TLS_SNI] => demo1-andreych1500.school-php.com
            [REDIRECT_STATUS] => 200
            [UNIQUE_ID] => YH4fd7I52n8AAAyEQW4AAABj
            [HTTPS] => on
            [SSL_TLS_SNI] => demo1-andreych1500.school-php.com
            [HTTP_HOST] => demo1-andreych1500.school-php.com
            [HTTP_CONNECTION] => Keep-Alive
            [HTTP_ACCEPT_ENCODING] => gzip
            [HTTP_CF_IPCOUNTRY] => US
            [HTTP_X_FORWARDED_FOR] => 3.238.206.122
            [HTTP_CF_RAY] => 642a3c450d6d576d-IAD
            [HTTP_X_FORWARDED_PROTO] => https
            [HTTP_CF_VISITOR] => {"scheme":"https"}
            [HTTP_USER_AGENT] => CCBot/2.0 (https://commoncrawl.org/faq/)
            [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
            [HTTP_ACCEPT_LANGUAGE] => en-US,en;q=0.5
            [HTTP_CF_CONNECTING_IP] => 3.238.206.122
            [HTTP_CDN_LOOP] => cloudflare
            [HTTP_CF_REQUEST_ID] => 098e43ff240000576d16bf1000000001
            [PATH] => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
            [SERVER_SIGNATURE] => 
            [SERVER_SOFTWARE] => School-PHP
            [SERVER_NAME] => demo1-andreych1500.school-php.com
            [SERVER_ADDR] => 178.57.218.127
            [SERVER_PORT] => 443
            [REMOTE_ADDR] => 172.69.63.98
            [DOCUMENT_ROOT] => /var/www/school-php.com/public_html
            [REQUEST_SCHEME] => https
            [CONTEXT_PREFIX] => 
            [CONTEXT_DOCUMENT_ROOT] => /var/www/school-php.com/public_html
            [SERVER_ADMIN] => admin@static.school-php.com
            [SCRIPT_FILENAME] => /var/www/school-php.com/public_html/index.php
            [REMOTE_PORT] => 10652
            [REDIRECT_URL] => /courses/php7-i-mysql-sredniy-uroven/урок-17/memcache-opcache
            [REDIRECT_QUERY_STRING] => route=courses/php7-i-mysql-sredniy-uroven/урок-17/memcache-opcache
            [GATEWAY_INTERFACE] => CGI/1.1
            [SERVER_PROTOCOL] => HTTP/1.1
            [REQUEST_METHOD] => GET
            [QUERY_STRING] => route=courses/php7-i-mysql-sredniy-uroven/урок-17/memcache-opcache
            [REQUEST_URI] => /courses/php7-i-mysql-sredniy-uroven/%D1%83%D1%80%D0%BE%D0%BA-17/memcache-opcache
            [SCRIPT_NAME] => /index.php
            [PHP_SELF] => /index.php
            [REQUEST_TIME_FLOAT] => 1618878327.0546
            [REQUEST_TIME] => 1618878327
        )

    [t] => 1618878327.0564
    [GLOBALS] => Array
 *RECURSION*
    [_SESSION] => Array
        (
            [antixsrf] => ef86f191fc6e3a03dc6e5fd3642162a3
        )

)

DEBUG BACKTRACE

#0  FW\MyErrorHandler\MyErrorHandler::handler(2, Trying to access array offset on value of type null, /var/www/school-php.com/public_html/modules/courses/lesson.php, 295) called at [/var/www/school-php.com/public_html/modules/courses/lesson.php:295]
#1  require(/var/www/school-php.com/public_html/modules/courses/lesson.php) called at [/var/www/school-php.com/public_html/modules/courses/controller/controller.php:11]
#2  require(/var/www/school-php.com/public_html/modules/courses/controller/controller.php) called at [/var/www/school-php.com/public_html/index.php:215]
#3  FrontController::init(courses/php7-i-mysql-sredniy-uroven/урок-17/memcache-opcache) called at [/var/www/school-php.com/public_html/index.php:245]

TIPS

Незадокументированный тип ошибки