Unable to update AWS S3 CORS POLICY

Question

I needed to change my AWS S3 bucket CORS policy to enable the upload of files for my ReactJS to AWS S3, but I keep getting this API response:

Expected params

Answer 1

We encountered the same error. We needed two fixes. (Not sure if this is helpful in your case):

1. Pay attention to the type of quotes used: "" vs “”. Use the former
2. Make sure you do not have a trailing comma on the second to last line, following the bracket.