Toddler scared of 🚽!!

Few months ago we started potty training and it went soooo well. She did her wees in the toilet and she knew exactly what she’s supposed to do - use tissue, flush etc. However, after a few days she started becoming extremely scared of the loo!!! Like she won’t even sit on it. I don’t know of anything that has happened to trigger this. Now she is completely refusing to sit on there and screaaaams on top of her lungs. Help 😭😭😭