Ok, I didn't bother to look at the version number of BIM Server 19 after thinking the installer failed because it wanted 'archicad.exe'. I tried again this morning thinking it kept failing and finally looked at the version number in the BIM Server Manager. I shared a project and it works.
Worst installer ever.
It's a little dismaying that I'd be the first to bring this up. And that product testing just doesn't happen at Graphisoft...? Makes me think worldwide that I'm the first to run in to this nearly a month after the update was released. **crickets**
AC19-23 | Win10 Pro | i7-8700K | Quadro P600 | 500gb 960 EVO M2 | Dual 28" 4k Samsung U28E590