Error during downloading data from cloud repository. (Error message "end of file")

[Zoroiscrying]

This is confusing. When I try to add a cloud repository's work space to my plastic SCM cloud application, this error occurs. See in the first uploaded image.

Wonder if this is a sign of bad connection or something. Also tried to add a connection profile in the preferences, but failed with a message saying invalid credentials, I think that happen because the server actually use NameWorkingMode(or SSOWorkingMode in client.conf)? See in the second uploaded image.

Anyways, this is frustrating. Hope someone can help me with this.

Also, default ssl server created by Unity Hub is accessible.