my configuration on the dbms oracle 12c 12.1.0.1 orapki wallet create -wallet -pwd -auto_login orapki wallet add -wallet -trusted_cert -cert "" -pwd -sign_alg sha256 BEGIN DBMS_NETWORK_ACL_ADMIN.CREATE_ACL ( acl => 'ACL_WEB.xml', description => 'ACL FOR HTTP CALL PURPOSES', principal => 'PUBLIC', is_grant => TRUE, privilege => 'connect', start_date => NULL, end_date => NULL); DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL (acl => 'ACL_WEB.xml', HOST => '*', lower_port => NULL, upper_port => NULL); DBMS_NETWORK_ACL_ADMIN.ASSIGN_WALLET_ACL ( acl => '/sys/acls/ACL_WEB.xml', wallet_path => 'file:'); DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE ( ACL => '/sys/acls/ACL_WEB.xml', PRINCIPAL => 'APPS', IS_GRANT => TRUE, privilege => 'use-client-certificates'); COMMIT; END; / ----- query test certificate----- select utl_http.request(url => 'https://.....', wallet_path => 'file:', wallet_password => ) resp from dual; here I have an error : 0ra-29024 certificate validation failure