08-13-2019 08:01 PM
I have mac OS Mojave 10.14.5and my printer is hp DeskJet ink Advantage 4670 All-in-one model 4675
I have tried your recommendation and everything else I have read here and the message is there and it is not printing but I have made a change on my internet service I had cooper and now Optic fiber, and I was connected to a Reuter and now to a switch
I appreciate your time and effort
09-24-2019 08:56 AM
One possibility is that the printer's server certificate has expired. This issue is very similar to one that has been seen on some inkjet projects. The solution for that issue is in the document "'Encryption Credentials Expired' Error Displays".
URL to document
If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution and Kudos buttons, that'll help us and others see that we've got the answers.
10-31-2019 12:03 PM
See this post: "Encryption Credentials have expired." when attempting to print or scan from Mac OS or iOS devices.
It goes through generating a new certificate as well as picking a different print queue.