Warning: require_once(/override/classes/ObjectModel.php): Failed to open stream: No such file or directory in /vendor/prestashop/autoload/src/Autoloader.php on line 86

[djo1919]

Hello Prestashop Community,
After changing the PHP version from 8.2 to 8.1 I have this problem below.
Warning: require_once(/override/classes/ObjectModel.php): Failed to open stream: No such file or directory in /vendor/prestashop/autoload/src/Autoloader.php on line 86

Warning: require_once(/override/classes/ObjectModel.php): Failed to open stream: No such file or directory in /vendor/prestashop/autoload/src/Autoloader.php on line 86

Fatal error: Uncaught Error: Failed opening required '/override/classes/ObjectModel.php' (include_path='/vendor/pear/pear_exception:/vendor/pear/console_getopt:/vendor/pear/pear-core-minimal/src://vendor/pear/archive_tar:.:/usr/lib/php8.1') in //vendor/prestashop/autoload/src/Autoloader.php:86 Stack trace: #0 //classes/shop/Shop.php(33): PrestaShop\Autoload\Autoloader->load() #1 //vendor/prestashop/autoload/src/Autoloader.php(86): require_once('/homepages/19/d...') #2 //vendor/prestashop/autoload/src/Autoloader.php(96) : eval()'d code(1): PrestaShop\Autoload\Autoloader->load() #3 //vendor/prestashop/autoload/src/Autoloader.php(96): eval() #4 //config/config.inc.php(117): PrestaShop\Autoload\Autoloader->load() #5 BACKOFFICE/index.php(40): require('/homepages/19/d...') #6 {main} thrown in //vendor/prestashop/autoload/src/Autoloader.php on line 86

Thank you in advance

[Prestashop Addict]

Clear the var/cache/*

[djo1919]

Problem solved. This file (ObjectModel.php ) was missing that's why (I found it into a backup I made before).
Thank you for your reply