Failed update to 1.0-beta7 version breaks site.

Problem 1
    - Installation request for drupal/inline_entity_form (locked at 1.0.0-rc3, required as ^1.0@RC) -> satisfiable by drupal/inline_entity_form[1.0.0-rc3].
    - Installation request for drupal/commerce_paypal 1.0-beta7 -> satisfiable by drupal/commerce_paypal[1.0.0-beta7].
    - drupal/commerce_paypal 1.0.0-beta7 requires drupal/commerce ^2.19 -> satisfiable by drupal/commerce[2.x-dev, 2.19.0].
    - drupal/commerce 2.x-dev requires drupal/inline_entity_form ^1.0-rc6 -> satisfiable by drupal/inline_entity_form[1.0.0-rc6].
    - drupal/commerce 2.19.0 requires drupal/inline_entity_form ^1.0-rc6 -> satisfiable by drupal/inline_entity_form[1.0.0-rc6].
    - Conclusion: don't install drupal/inline_entity_form 1.0.0-rc6

Site breakage Error at /admin/reports/updates

Warning: include(/var/www/html/vendor/composer/../../core/lib/Drupal/Core/DrupalKernel.php): failed to open stream: No such file or directory in /var/www/html/vendor/composer/ClassLoader.php on line 444

Warning: include(): Failed opening '/var/www/html/vendor/composer/../../core/lib/Drupal/Core/DrupalKernel.php' for inclusion (include_path='/var/www/html/vendor/pear/archive_tar:/var/www/html/vendor/pear/console_getopt:/var/www/html/vendor/pear/pear-core-minimal/src:/var/www/html/vendor/pear/pear_exception:.:/usr/share/php') in /var/www/html/vendor/composer/ClassLoader.php on line 444

Fatal error: Uncaught Error: Class 'Drupal\Core\DrupalKernel' not found in /var/www/html/index.php:16 Stack trace: #0 {main} thrown in /var/www/html/index.php on line 16