Hi,
I noticed that PreviewRenderUtility wasn’t working on 2017.1f1 and I got a weird error about it. After some google search, I found a similar issue that someone else reported already so I decided to not create a new ticket issue and I hoped that it will be fixed by the final release of 2017.1.
If someone else has the similar issue, please let’s create a ticket and get enough votes to be sure that it will be fixed by next patch or release.
Thanks.