Needed for non https local EDD store to correctly run. Set $store_url to your local store URL.

local-edd-store.php

<?php
/**
 * Plugin Name:     Local EDD Store
 * Description:     Set `reject_unsafe_urls` to false for $store_url. $store_url will need to be set for the URL of your local EDD store.
 * Author:          Andy Fragen
 * Version:         0.3
 * Gist Plugin URI: https://gist.github.com/afragen/ed00f34f8e03aeedb96bdbf6f3e50495
 */

add_filter(
	'http_request_args',
	function( $r, $url ) {
		$store_url = 'eddstore.test';
		if ( false !== strpos( $url, $store_url ) ) {
			$r['reject_unsafe_urls'] = false;
		}
		return $r;
	},
	10,
	2
);