WWW loads forever

I use WWW to load text from my server. It’s just a short JSON, but it loads forever. No error. Zero progress. I can easily load it with my browser but not with Unity WWW API. If i change the URL to some random website, it loads well. Do you think it’s because of the server side? Did you get this problem before? please help me!

Try reproducing with a local server. Then use network analysis tools. Or submit a bug report: