On 1.7.4 worked great but when i updated now i can't get the links, when upload is finished nothing happens.
it just stays like this and nothing happend.
i tried to fix but i don't know what to do. any help ?
Make sure to have updated .js files, not only in your server but in any CDN or cache system (like CloudFlare). In every update all the static resources gets a new query string that should avoid cache, but sometimes either server cache or client side cache is too aggressive.
Demo works fine with or without that option enabled so that's not the problem. Most likely you had a cached version of that file, maybe even an outdated version of it.