newbie stuck at step 1

[pcn]

Hello. 

I run macOS.

I made my first repo in bitbucket. Then as instructed I issued
$ git clone https://pcnUpenn@bitbucket.org/pcnUpenn/myplayground.git

But bash said:

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

Now, one suspicious thing is that after joining bitbucket I never installed git. So /usr/bin/git was lying around left over from some historical period (possibly when I installed GitHub Desktop.app).

Thanks.

[pcn · Accepted solution]

OK, I found my solution, then hit a second wall: Solution is

xcode-select --install

The next wall is that the git clone command requests my password. I created the account using SSO authentication. But git clone is not accepting that password. Thanks again. 

[pcn]

And here is a solution to the second wall:

One workaround I found was to abandon the command line and install SourceTree. I'd still be interested in a command-line solution.