PHP-ERROR >><br />
<b>Fatal error</b>:  Uncaught Error: Interface 'Drupal\Core\Cache\RefinableCacheableDependencyInterface' not found in /opt/drupal/web/core/lib/Drupal/Core/Config/ConfigBase.php:27
Stack trace:
#0 /opt/drupal/web/vendor/composer/ClassLoader.php(444): include()
#1 /opt/drupal/web/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/opt/drupal/web...')
#2 [internal function]: Composer\Autoload\ClassLoader-&gt;loadClass('Drupal\\Core\\Con...')
#3 /opt/drupal/web/core/lib/Drupal/Core/Config/StorableConfigBase.php(25): spl_autoload_call('Drupal\\Core\\Con...')
#4 /opt/drupal/web/vendor/composer/ClassLoader.php(444): include('/opt/drupal/web...')
#5 /opt/drupal/web/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/opt/drupal/web...')
#6 [internal function]: Composer\Autoload\ClassLoader-&gt;loadClass('Drupal\\Core\\Con...')
#7 /opt/drupal/web/core/lib/Drupal/Core/Config/Config.php(19): spl_autoload_call('Drupal\\Core\\Con...')
#8 /opt/drupal/web/vendor/composer/ClassLoader.php(444): include('/opt/drupal/we in <b>/opt/drupal/web/core/lib/Drupal/Core/Config/ConfigBase.php</b> on line <b>27</b><br />