I know that similar question is already posted here, however I think that my scenario is a bit different. Here is what I have.
I downloaded and installed the latest official version of the SourceTree software. Also, I have GitHub account with permissions to clone and push the repository. In order to manage a local copy I need to clone the on-line version. Here are the steps that I take:
- Start the SourceTree and navigate to File -> Clone / New ...
- In the opened window I paste the HTTPS clone URL. I copied it from the browser after I logged-in my GitHub account, so the link is correct.
The nest step is to specify a local folder where the repository will be copied. But when I click to enter Destination Path, the window shows an error:
This is not a valid source path / URL
clicking the error may give the details:
remote: Repository not found. fatal: repository 'https://github.com/org/repo.git/' not found remote: Repository not found. fatal: repository 'https://github.com/org/repo.git/' not found
Or, the Details may be empty. The SourceTree does not tell me the reason for the error or anything else.
I tried to re-install the SourceTree but the error still exists. I asked the Administration of the GitHub repository for any other permissions but my account has all of them. I am able to push changes to the online repository using the Terminal console, but I would like to use UI (that SourceTree provides) to manage and compare changes in the code.
One think I did not try is to Clone the repository using another GtHub account. But I don't want to do that because I need to commit any changes to the repository on my behalf.
Does anybody know how can this error be fixed or worked around?

