4 year old: terrified all of a sudden to sleep in room

Hi everyone! Looking for some advice. My daughter turned four at the end of June. She has always slept great in her room no issues. She has had the same bed (twin size floor princess bed) since 3. All of a sudden she is terrified to sleep in her room. When I talk to her about this she says she is afraid of the dark. She has night light all through her room.
This has never been an issue before. I try to make her feel safe, made some “monster spray” and we did that together. I also got some cute fairy lights for around her bed so the room is not dark and nothing at all is helping. Every night is screaming that she is afraid.

Has anyone else dealt with this that could offer some advice?

Thanks so much!