I have a father blog / main blog inside a multisite that has a specific taxonomy with 20+ terms inside it. i just need a list of all the terms inside that taxonomy…

i dont mind quering using WPDB but just dont know to how to write it correctly or in any other way i tried use: “switch_to_blog” but that doesnt work when quering terms

Any suggestion?
i tried the: Multisite Global Terms plugin (doesnt work)…

EDIT (response to question in comment)
this is an example of switch_to_blog i tried:

function multisite_profession_select(){

        switch_to_blog(1);

        $taxonomies = array('rsitecat');
        $args       = array('hide_empty' => false);
        $terms      = get_terms($taxonomies, $args );

        echo '<pre>';
        print_r($terms);
        echo '</pre>';

        restore_current_blog();

    }

The reponse i get:

WP_ERROR OBJECT
(
    [ERRORS] => ARRAY
        (
            [INVALID_TAXONOMY] => ARRAY
                (
                    [0] => INVALID TAXONOMY
                )

        )

    [ERROR_DATA] => ARRAY
        (
        )

)