The final campaign has been launched!

I have this question: I completed the final mission of "Angels Also Cry" with Nastya. I completed it without the bonus, and I didn't really need it. But, does anyone know how to proceed to the second mission, "Too Bright for Darkness"? I've already pinned Misha twice, and then I go back to the main menu (because that's all that's available there: either load or the main menu). I go back into the campaign, select Nastya and the other heroes, but the second mission still can't be selected. What do I need to do to start playing the second mission of the final campaign? Please advise, because I'm already at a loss...