As the screenshot shows the translations haven't been updated and some worksets that you have requested earlier cannot be loaded. Biggest problem is the translation right now, because you couldn't tell what rating you are giving to revision, so could someone update those? Translations have been updated couple weeks ago on translatewiki.
Thank you for letting me know, I just deployed a new version which adds those new translations and it should be okay now. We close the old worksets and accessing them should not be possible :) If you want to label, just get a new workset.
Thank you again for your work