I've just downloaded the most recent public beta from the App Store. It downloaded fine, but after restarting to install, it starts the install and then the attached appears. No matter how many times I do it, it won't install. Am I the only one with this issue? Any fixes??
Not sure. I had the developer beta for macOS installed and then tried to switch to the public beta and kept having the issue you are having. Ended up having to switch back to the developer beta. My iPad and iPhone are on public beta though