TypeError: opt_data.project is undefined

This is caused due to the fact that stash.feature.project.projectRow (in projectTable.soy) was changed to take a project as a parameter instead as the data itself.

Workaround: Navigate to the repositories via the per project repository list (.e.g https://stash.example.com/projects/PROJECT_KEY) or via the "Recently Viewed" repository list in the menu.