Thank you for your message. I am sorry you are having this problem.
Is your composition reference image transparent? If so, fill in the transparency with a contrasting colour. The prompt also makes a difference. Please share an image that shows your prompt and the composition reference.
Images should have a focal point when used for Composition/Structure reference. This image has a lot going on for the AI to discern the subject structure.
Second, the main subject is obscured - meaning the child has their back to the camera.
Third - The prompt is asking for a cartoon which contradicts the image used for reference.
Try this instead - no uploaded image, prompt is:
"Illustration of a girl receiving holy communion from an adult in front of her; adult is kneeling"
you can ellaborate from there "girl with blonde hair and pig tails" etc. to refine.
If you really want a cartoon-like image, you can add that to the beginning of the prompt.
"Cartoon illustration of a girl receiving holy communion from an adult in front of her; adult is kneeling"