How to fix "failed to open stream" error when you delete doctrine proxies directory
Whoops\Exception\ErrorException thrown with message "require(/path/to/concrete5/application/config/doctrine/proxies/__CG__ConcreteCoreEntityExpressEntity.php): failed to open stream: No such file or directory"
Enable "Doctrine Dev mode" manually
application/config/concrete.php file (or modify it) like below:
<?php return [ 'cache' => [ 'doctrine_dev_mode' => true ], ];
When you check your site comes back, please turn off the doctrine dev mode. If it enabled, your site will slow down.
Sometimes you have to run refresh entities command too.