Needing parenting advice

So I need help from the parents of toddlers. My daughter randomly about a month ago stopped sleeping in her room, she still plays in it and everything. She claims spiders or Spider-Man is in her room. Well she stopped saying that but she still won’t sleep in it. We’re back to sleeping at a decent time but she ONLY wants to sleep on the living room floor. How do I get her back into her bed, I’ve tried picking her up and putting her in there and once she notices she runs back out of her room. She can open her door & she has a Montessori bed. Even the car to bed she wakes up. When sleeping with her in the living room I keep noticing she has quite a few nightmares or something she will randomly cry and whimper in her sleep. What do I do? Is this normal?