My Mamiya RB67 triggers and shutter lease lever

This is not the best solution as it indicates a faulty film back. The film should advance without resorting to activating the film-wind release lever. That is only for intentionally advancing a partially exposed roll of film. Make sure the multi-exposure lever is not engaged and that the counter does advance and the red mark disappears as you advance to an unexposed frame.

I located the film wind-stop release lever which allowed me to operate the film advance lever.