Hi,
just I downloaded F26 RC 1.5 from the official download site. Tried to boot the installed (on a 64GB USB stick), dracut error. I have had the same error previously on one of the prereleases of F25, there it was a timer, which was adjusted badly for my system.
Acer Laptop with Win 8.1, Fedora on an USB flash medium. Possibly the USB flash medium is at the end of it's life, I will try this on a new 32GB USB flash medium. But anyway I want to inform You as quickly as possible about what has happened. See screen shot attached.
Kind regards