Sure… I’m typing this out as I do the steps
1. Fresh install of 4.9.5 (PHP 7.2.1)
2. Fresh install, activation of Gutenberg Version 2.8.0
3. Download, install, and active jsforwp-how-to-gutenberg.zip, and jsforwp-example-blocks.zip from your repo
4. Go create a new post, add a new block and … everythings working… OMG
Sorry for the trouble… all seems well – thanks for taking a look sorry for wasting your time!
PS – I did do this twice before asking for support… lol