How to clone repo in DevOps properly?

[evan]

I connected my DevOps Account into SourceTree. And It shows the list of my repos correctly.

Now, I'd like to clone them. But when I click 'Clone' Button, It says 'This is not a valid source path / URL'. Source URL, Destination Path, Name are generated automatically. So, they don't have any problem in most of the cases. And I don't know what it means. 

How to clone repo in DevOps correctly? And also, push, pull, etc. without any problems in SourceTree.

FYI, Sourcetree version is 3.2.1