Error update 1.4.7

Updated today at version 1.4.7, I received through Query Monitor plugin Version 2 3.2.2 query and database errors.
WP 5.0.1
PHP 7.1.11

Duplicated query:
Query Conteggio Caller Componenti Possibili problemi
SHOW TABLES LIKE ‘wpza_wpgdprc_access_requests’ 2 do_action()
2 chiamate
Core
2 chiamate
do_action()
2 chiamate
SHOW TABLES LIKE ‘wpza_wpgdprc_delete_requests’ 2 do_action()
2 chiamate
Core
2 chiamate
do_action()
2 chiamate
SELECT wpza_users.ID,wpza_users.user_login,wpza_users.display_name
FROM wpza_users
INNER JOIN wpza_usermeta
ON ( wpza_users.ID = wpza_usermeta.user_id )
WHERE 1=1
AND ( ( wpza_usermeta.meta_key = ‘wpza_user_level’
AND wpza_usermeta.meta_value != ‘0’ ) )
ORDER BY display_name ASC 2 WP_User_Query->query()
2 chiamate
Core
2 chiamate
WP_User_Query->query()
2 chiamate

PHP Errors
Notifica Trying to get property of non-object 1

wp-content/plugins/wp-gdpr-compliance/wp-gdpr-compliance.php:204

Plugin: wp-gdpr-compliance