Error code 500, Backoffice login missing

[ROE]

Hi there,

After a failed update and restoring my shop and database from backups I am now unable to login to Backoffice. Front-end seems fine, but when I go to my backoffice-URL i get the Internal server Error 500 code and no login window.

In debug mode I get the message below. Tried to locate the file, but it seems to be missing from both my manual backup and the one created by Prestashop before the update. I am a bit stuck here and any help is appriciated.

Prestashop version 1.7.1.2

 

RuntimeException in DebugClassLoader.php line 258:The autoloader expected class "Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass" to be defined in file "/var/www/headbangers.dk/public_html/vendor/composer/../symfony/symfony/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php". The file was found but the class was not in it, the class name or namespace probably has a typo.

1. in DebugClassLoader.php line 258
2. at DebugClassLoader->loadClass('Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass')
3. at spl_autoload_call('Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass') in FrameworkBundle.php line 80
4. at FrameworkBundle->build(object(ContainerBuilder)) in bootstrap.php.cache line 2824
5. at Kernel->prepareContainer(object(ContainerBuilder)) in bootstrap.php.cache line 2803
6. at Kernel->buildContainer() in bootstrap.php.cache line 2753
7. at Kernel->initializeContainer() in bootstrap.php.cache line 2529
8. at Kernel->boot() in bootstrap.php.cache line 2560
9. at Kernel->handle(object(Request), '1', false) in index.php line 86

[MahmutGulerce]

Note: Before do anything please get a full backup as well. 

What an idea to download  1.7.1.2 files and override them via FTP ?  If your database is ok replacing the files will be enough to fix it. 

Otherwise you should have all files and database export of previous version (the best solution would be a serverside backup if you have)  and reinstall them. Then request a help for your second try to upgrade. 

Note: again, getting a full backup is strongly important before do anything on your files or database

 

 

[musicmaster]

File is in my 1.7.2 in /vendor/symfony/symfony/src/symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php

As Mahmut suggests you can try to override it with a copy from a fresh PS installation of the same version. 

It happens sometimes that files are cut to length 0. You can check for that.

[ROE]

Hi guys. Thanks for helping out. I did as Mahmut suggested: Installed the complete backup, downloaded a fresh install and copied the "fresh" file via FTP. Several other files came up missing (I guess there were some problems in the backup) and I ended up uploading the entire install, with the "fresh" files via FTP. Luckily there were no problems in my database backup and guess what; now everything works perfectly again :-) The only thing not working is the built-in Custom Text Block module, but it seems a lot of people are having trouble with this module...

Thanks again. You just saved me a couple of weeks work, rebuilding my shop.

//ROE