<br />
<b>Warning</b>:  Class "Psr\Container\ContainerInterface" not found in <b>/var/www/magento/vendor/laminas/laminas-servicemanager/src/autoload.php</b> on line <b>14</b><br />
<br />
<b>Warning</b>:  Class "Psr\Container\ContainerExceptionInterface" not found in <b>/var/www/magento/vendor/laminas/laminas-servicemanager/src/autoload.php</b> on line <b>17</b><br />
<br />
<b>Warning</b>:  Class "Psr\Container\NotFoundExceptionInterface" not found in <b>/var/www/magento/vendor/laminas/laminas-servicemanager/src/autoload.php</b> on line <b>20</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;Magento\Framework\Component\ComponentRegistrar&quot; not found in /var/www/magento/vendor/magento/framework/registration.php:9
Stack trace:
#0 /var/www/magento/vendor/composer/autoload_real.php(78): require()
#1 /var/www/magento/vendor/composer/autoload_real.php(61): composerRequiredcbac7c2939e04488d312e5addf3b3f2()
#2 /var/www/magento/vendor/autoload.php(7): ComposerAutoloaderInitdcbac7c2939e04488d312e5addf3b3f2::getLoader()
#3 /var/www/magento/app/autoload.php(51): include('...')
#4 /var/www/magento/app/bootstrap.php(44): require_once('...')
#5 /var/www/magento/pub/index.php(46): require('...')
#6 {main}
  thrown in <b>/var/www/magento/vendor/magento/framework/registration.php</b> on line <b>9</b><br />