this is not a valid source path/ URL

[ANGEL EDUARDO BARRETO FLORES]

Hi everyone, i´m new to using sourcetree with bitbucket and this is the first time that I use both of them, I already installed git and then I installed sourcetree, and then I followed all the steps for clone a repository for my company however I can´t do it because appear this message in sourcetree: this is not a valid source path/ URL, well I must mention that this is the first time that I tried to clone the repository alone because the first time I had the help of my mentor but for some reason i´m not able to clone that repository again.

If someone can help me with this issue, I will appreciate it very very much.