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Hello, 

I'm trying to upgrade from 1.7.3.1 to 1.7.5.0 using 1-click upgrade and i'm getting an error:

[INTERNAL] /xxx/xxx/public_html/xxx/modules/autoupgrade/classes/Parameters/FileConfigurationStorage.php line 53 - Class 'Symfony\Component\Filesystem\Filesystem' not found

Any idea or someone else has the same issue?

thanks in advance