can't install wp smush pro

hi i'm trying to install wp smush pro and i'm getting the following error message: Server error status: Internal Server Error [500]

    Ash

    Hello Gab

    Would you please enable debug mode and check if there is any error? To enable debug mode please go to wp-config.php and change

    define( 'WP_DEBUG', false );

    to

    define( 'WP_DEBUG', true );
    define( 'WP_DEBUG_DISPLAY', false );
    define( 'WP_DEBUG_LOG', true );

    That will create a file called debug.log inside wp-content folder. Open that file, check the very bottom and you will see the latest errors. Please send me those.

    Also let us know which php version you are using.

    Have a nice day!

    Cheers,
    Ash