Mercurial Embedded requires a config update on web.cacerts.

It should point to:
C:\Users\<user>\AppData\Local\Atlassian\SourceTree\hg_local\cacert.pem

Instead it points to:
C:\Program Files (x86)\Mercurial\cacert.pem

Which doesn't exist.

—

I have Mercurial Embedded in my PATH (also Git Embedded) and I got no problems until now. I use it through Go's "go get" CLI.

$ go get code.google.com/p/snappy-go/snappy
# cd .; hg clone -U https://code.google.com/p/snappy-go D:\<go_code_path>\src\code.google.com\p\snappy-go
abort: could not find web.cacerts: C:\Program Files (x86)\Mercurial\cacert.pem

So I dug in, found that path didn't exist and manually updated Mercurial.ini, problem solved.

Hope it helps.