media encoder only exports one frame

Hello, I have made an edit on after effects and as the h.264 video codec is gone, I tried to use adobe media encoder. However, whenever I render it, it renders super quick and only exports one frame. I've tried changing the time code and the problem isn't after-effects as I was able to export the full video (by changing the timecode however not with h.264). I've updated the app but nothing is working