From v3.0.0 onwards, Amazon changed their Elastic Beanstalk PHP Platforms to use nginx as their server instead of Apache. So htaccess rule no longer work
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.migration-al.html
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.