Catchable fatal error

Hi i hope your doing well,

i’ve this error msg on my site:
Catchable fatal error: Object of class stdClass could not be converted to string in /home4/pruebabonsai/public_html/nordic/wp-content/plugins/woocommerce/includes/wc-formatting-functions.php on line 290

This error only apears when you are log into admin.

How can i fix this?
Thanks best regards