Unfortunately it looks like a change in the latest insider build of Windows is causing problems for Fences. I do not know if this is a Fences side issue or a Windows side issue (it is crashing inside Windows code), but I am sure the development team will investigate to see if there is anything they can do.
We would recommend against the use of Windows Insider builds, especially those on the FAST track, unless you have specific need for them and obviously with Alpha OS updates comes with the risk of incompatibility issues like this. Once it has been investigated I would expect someone to post on the forums with an update.
