Same problem here. In the browser it says Figma “refused to connect” and in the desktop app it just doesn’t load at all. After a search, I found out it might be some problem with the iFrame configuration, but no clue how to solve it. 
 

Hi, facing preview issue in figma sites. Below is the preview screenshot which is totally different from what I created. Logo on top is broken, it was originally positioned on the left, and fonts are not appearing with the same properties as used in design. 

Hi there,
 

Thanks for flagging this.

I've tried to reproduce it on my end but it seems to be working fine. I also checked for similar reported problems but haven't found any.

Since it sounds like you've already tried basic troubleshooting steps like those in our Troubleshooting checklist, I'm now checking internally to see how we can best assist you, including any additional troubleshooting steps we can suggest.

Alternatively, I can help connect you directly with our team by submitting a report on your behalf. This would allow them to take a closer look at your specific file and investigate further. Please let us know.

Thanks,

Update: Our technical quality team also tried to reproduce this issue on our end, but it seems to be working fine.

If you're still experiencing the same issue, please let us know. We can help by creating a support request on your behalf.

Alternatively, you can always refer to this document to submit a bug report yourself: Submit a bug report

Thanks,

Ohh... so I’m not the only one. Sorry for swearing, i’m working on my patience 

pff nevermind, next day even when I select an element or specifically describe a title Figma Sites can’t even change it. Absolute waste of my time, Garbage.