AVD Session Host login error

Question

Login session after using the client desktops windows is error when attempting to have access to the host and virtual machines can not access.The following error occurred and to all users normally do you start the virtual machine access.

Error: “A certification authority could not be contacted for authentication. If you are using a Remote Desktop Gateway with a smart card, try connecting to the remote computer using a password. For assistance, contact your administrator or technical support”