Laravel response json not working on live server, it gives connection timeout

I have deployed my project to AWS server with php7.1 mysql, and I am using laravel 5.5. All things are working fine except ajax call response. When I try to request through ajax call ($.post method) It show pending status for a while, but gives connection time out with status failed. Ajax call works fine on my local setup. Can anyone help me to short it out. Thanks in advance.

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