› Forums › MyID knowledge base › MY0197 Web Services Error Code 890550 This topic is empty. Viewing 1 post (of 1 total) Author Posts 18th February 2020 at 11:02 am #2206 MyID SupportKeymaster Error Code 890550 Text Error with TPM Details The client workstation has reported that it has no Endorsement Key Hash available. An Endorsement Key is required to perform Attested Device Identity issuance. Solution The client workstation is unsuitable to receive the credentials requested for it. Issuance cannot continue. Relates To Credential Issuance Author Posts Viewing 1 post (of 1 total) The forum ‘MyID knowledge base’ is closed to new topics and replies.