When attempting to favorite this repository, the error in the screenshot below shows up. The linked repository has a master branch, but the master branch has no Jenkinsfile, rather there are other branches which each contain a Jenkinsfile.

There are a few minor UX issues here:

• Uncaught JavaScript error, womp womp.
• The error message is misleading, there is a master branch, it just does not contain a Jenkinsfile. Perhaps something like "No Pipeline for default branch (e.g. "master") to favorite"
• After the error, the "selected star" (i.e. yellow star) persists in the screen which makes it appear as if the favoriting completed .