In the EU07 tutorial you need to switch on the radio and select the desired channel. I have seen a very old youtube where you apperently only need to turn the radio on. I tried, but the yellow objective line stays lit and whatever channel I try, it makes no difference. I fout a tutorial here at the forums, and someone asking the same question, in December 2022. Then someone replied it is a know bug. So that is two years ago, not solved and it makes the tutorial unplayable and following it makes it very hard to play this engine. I tend to give this game a very negative review.