ErrorException require(/vendor/magento/framework/registration.php): failed to open stream: No such file or directory

i have two Magento projects,

website1 with : -php fpm7.1 -mysql 5.7 -apache2 2.4.41 -composer 1

and wibsite2 with : -php fpm7.4 -mysql 5.7 -apache2 2.4.41 -composer 2

the problem now is that i can run website1 perfectly with no problem with setup:upgrade,composer install... and i can access to the website by the browser, but the website2 can't be accessible by browser, and it tells me the error below when I run composer install

 [ErrorException]                                                                                                                   
  require(vendor/magento/framework/registration.php): failed to open stream: No such file or directory  

any help please?

source https://stackoverflow.com/questions/71184198/errorexception-require-vendor-magento-framework-registration-php-failed-to-op