How to resolve this error

i have created an api for my doctype on my local server, when i am doing POST method on postman the data is saved in the doctype, but when i am uploading my project on aws server then doing POST method it is showing this error

for authentication i have written api access key in header for user(from user list) in postaman
and in authorization of postman also written aws signature all the data required
then also it is showing broken pipe error??Help