VisualStudio.com can't load the temporary UWP certificate during builds

Question

I set up my Visual Studio Team Service account to clone my private GitHub repo and build the Windows UWP application anytime I queue a build. The cloning works without any issue

Answer 1

Had the same issue (error APPX0107: The certificate specified is not valid for signing) and tryed every solution but nothing worked for me. In fact their was a new line after the key name in the .csproj:

myCert.pfx

Removed it and it worked.