When I configure nginx with signature calculation S3 cp fails with errors

[anils123]

I configured nginx with the following configuration S3 cp with KMS encryption fails

location / {
resolver 8.8.8.8;
proxy_pass https://s3.amazonaws.com;
proxy_ssl_name s3.amazonaws.com;
proxy_pass_request_headers on;
client_max_body_size 5G;
proxy_send_timeout 600;
proxy_read_timeout 600;
proxy_intercept_errors on;
proxy_next_upstream error timeout http_500 http_502 http_503 http_504;
aws_sign;
aws_signing_key
}
I get this error

ResponseParserError: Unable to parse response (mismatched tag: line 6, column 2), invalid XML received:

<title>405 Not Allowed</title>

405 Not Allowed

---

nginx/1.14.0

upload failed: ./test.txt to s3://..../test.txt An error occurred (405) when calling the PutObject operation: Method Not Allowed
Appreciate your advise on this