When marking something for translation, the last few weeks it's been a common for the Translate extension to not load translation aids: "Failed to load translation aids: Title does not correspond to a translatable message". This happens when one tries to translate shortly after marking it for translation. It has, so far, started working after a while, but is a problem because there isn't always time to wait before test translating it and sending it out to translators – other tasks, or the entire thing having to wait until the next day because one has to go do non-Wikimedia things.

Unlike the bug where the Translate extension won't save translations, this can't be fixed by making a small edit an re-marking for translation.