Using Captivate 2017 I can’t publish html5 nor preview, Can you please help me to fix it?

I have installed the latest version of Captivate. I tried to publish and preview my project in both swf and html5, but it shows a spinning gif on a white page. The html5 does not load at all on any browser. I restarted my computer and got the same result. Can you please help me to fix it?