Not enough happening. Unfortunately plot issues like this are a big deal. If I reach page fifty and I still don’t know where the story is going, it’s an enormous red flag. In an average manuscript, fifty pages is around 20% of a novel, give or take. By 20%, the inciting incident should have definitely happened, and the point of no return should be hinted at, if not already passed.
Great list of problems with fiction; use this list to check your current novel.
If there's nothing happening, it's usually because the writer's telling, not showing action in scenes.