Upgrade issue: 4.17.3 to 4.18.1

[w3cert]

Hi,

The cscart version not updated on release so waited to update now.
when try to update 4.18.1 from 4.17.3 sp3. it showing updated successfully but when open the site it showing 500 error. checked the nginx logs.

logs:

2025/05/19 08:41:07 [error] 61072#61072: *1 FastCGI sent in stderr: “PHP message: PHP Warning: require(/var/www/html/app/lib/vendor/composer/…/guzzlehttp/psr7/src/functions_include.php): Failed to open stream: No such file or directory in /var/www/html/app/lib/vendor/composer/autoload_real.php on line 41; PHP message: PHP Fatal error: Uncaught Error: Class “Tygh\Tools\ErrorHandler” not found in /var/www/html/admin.php:25
Stack trace:
#0 {main}
thrown in /var/www/html/admin.php on line 25” while reading response header from upstream, client: 127.0.0.1, server: domainexample.com, request: “GET /admin.php?dispatch=upgrade_center.manage HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php/php8.2-fpm.sock:”, host: “domainexample.com”, referrer: “https://domainexample.com/admin.php?dispatch=upgrade_center.manage”

Note:
i also checked path Tygh\Tools\ErrorHandler found file.

thanks

[CS-Cart_team]

Hi!

Please ensure that the app/lib/vendor/guzzlehttp/guzzle/src/functions_include.php file is present in your installation. If not, you can obtain the missing file from the same version of the CS-Cart distributive that is currently installed.