Last modified: 2014-06-20 07:31:41 UTC
Using the 1.23 branch for UploadWizard, one is unable to upload any file because it cannot find mw.log.warn. This problem is in the JavaScript.
You are using the 1.22 branch, actually; it is mislabeled. This is bug 64157. There is no real 1.23 branch, but you can use the wmf/1.23wmf22 branch, that's close enough.