Steps to replicate the issue (include links if applicable):

• With VisualEditor active, click the "Edit" button

What happens?: VisualEditor not working. (The toolbar pops up for a second and disappears again)

What should have happened instead?: VisualEditor should be working.

Software version (skip for WMF-hosted wikis like Wikipedia): MediaWiki 1.39.0-alpha (83efda9), VisualEditor 0.1.2 (979b382)

Other information (browser name/version, screenshots, etc.): The browser console reports: VisualEditor failed to load: Error: Unknown module: mw.config.values.wbRepo