Hi,

i think you must made a mistake in the Vue "footer_copyright_company_name".

You can reset the default Vue to see if it's working.

TEST it on a copy of your database.

If it's working, to desactivate the "Powered by Odoo", you have to be in edit mode of your website and select the footer with the "credential" of Odoo, and unselect the "copyright" in you Footer menu editor :

Hope it'll help