why is it so hard to get any Twitter working on site ?!?!?!?!?

I can’t get any twitter widgets to work. I’ve tried almost all of them available including the official one which requires pasting html code. Nothing works.

Why doesn’t www.remarpro.com have prefab twitter default widgets? It’s so frustrating that something as basic and prevalent as twitter feeds can’t be easily setup on a website.

If there is any help available for this I would love to hear it. I’ve been battling this problem for a week now and my site is about to launch in 2 days.