The documentation portal is undergoing maintenance. During this period, you can't create any new user credentials. If you do, you'll need to recreate the user credential after the maintenance period ends.
The SSL_TOLERATE_UNTRUSTED_ISSUER statement controls whether to continue or stop processing after a certificate error 6000 has been reported. This situation occurs when SSL_REQ_CLNT_CERT=Y and the partner CA is not present among the trusted CAs on the IBM i machine.