However, it’s got a very annoying bug: for “It’s no big deal” there are 2 italian translations: Ci mancherebbe; and Non e niente di che.
I have a 50/50 chance of getting it right each time. Therefore thought I’m QUITE familiar with both phrases now, they both end up in my “difficult words”.
I don’t see a thread for the course on the forum, but the author Polpo_D has an account. I’ll flag him here: @Polpo_D.
If he doesn’t reply you could try and send him a message.