Laravel, Dropzone, and S3

I have dropzone configured with Laravel and S3, for small files everything works smoothly. I can see files uploaded.

I am trying to upload 2.5MB file using the same approach but nothing works I always get

`Network Error (tcp_error)

A communication error occurred: "Can't send more" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.`

I changed PHP settings to increase upload size and max_post_size, yet nothing worked

what could be the issue?

via Chebli Mohamed