ContainerBuilder not found

[NeroAdvents]

Hi,

I've recently encountered an issue after installing a new package with composer in my PrestaShop project.

Now, when I want to access my back office, this message appears on the screen : 

 

Fatal error: Uncaught Error: Class 'PrestaShop\PrestaShop\Core\ContainerBuilder' not found in /var/www/preprod17/config/bootstrap.php on line 34

Error: Class 'PrestaShop\PrestaShop\Core\ContainerBuilder' not found in /var/www/preprod17/config/bootstrap.php on line 34

The file exists inside the src/Core folder. Even if I remove the package, delete the cache folder, it keeps display this error message.

If someone could help me it would be great !

Thanks.

[Tomacoulli]

Hello,

Did you fix this problem ? 

I've the same problem, do you have any tips ? 

thanks

best regards