I had the same problem when installing the game for the first time today on XBox PC Store. Manually adding a "logs" folder to %appdata%7DaysToDie fixed it for me as well. When you first launch the game and it pops up the launcher window there is no 7DaysToDie folder under AppData. Manually running the 7daystodie.exe file creates the folder under AppData but for some reason it does not create a logs folder. Perhaps the devs should move the folder creation process to the launcher and not the main executable? Anyway, run the game once without the launcher, add a "logs" folder to %AppData%7DaysToDie and it all works as intended.
