HTML Preview Issue

Hello, 

I don't understand what is the problem here. In a translation Project (Word-Docs) I activated HTML preview, and after a couple of minutes, i get this message below popping up. After closing the Preview Screen it keeps popping up every 3 seconds, causing slowing down and extreme CPU loads, so working is impossible.

 

My questions: 

1. Why does Studio have this feature that doesn't work properly?

2. How do I kill the previewing proces effectively without restarting Studio?

 

 

Best Regards, 

Jan