The authorization header is malformed; the region '<AWS Region>' is wrong;

I have a CloudFront instance binded to S3, and getting this error
<Code>AuthorizationHeaderMalformed</Code>
<Message>The authorization header is malformed; the region 'eu-central-1' is wrong; expecting 'us-east-1'</Message>
<Region>us-east-1</Region>

Symptoms are like here
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/http-400-bad-request.html

I edited my S3 origin yesterday aand still see same error 400