Membership Key


In the Wordpress Profile page, when user tries to see his Membership Key, the system shows the following source code error:

Warning: Illegal offset type in isset or empty in /home/encuadre/public_html/wp-includes/pomo/translations.php on line 72

Warning: md5() expects parameter 1 to be string, array given in /home/encuadre/public_html/wp-content/plugins/wpml-string-translation/inc/functions.php on line 1081

Please, can you help us with this issue?

Thanks in advance.

Kind regards,
Juan Carlos