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https://www.backyardchickens.com/articles/sour-crop-impacted-crop-doughy-crop-prevention-and-treatments-of-crop-disorders.67194/

You did say that it doesn't have a smell, so it may not be sour crop. I'm not an expert, though.

https://www.backyardchickens.com/articles/how-to-treat-sour-crop-and-impacted-crop-and-how-to-know-which-one-youre-dealing-with.73607/

DO NOT try to vomit your bird. It often leads to them aspirating the vomit.