MDS fails to create website with error "no master data services instance section exists"
I installed SQL Server Developer Edition with Master Data Services. I turned on IIS Express with all of the MDS dependencies. When I open MDS Configuration Manager, it shows a green check mark for IIS, so it thinks IIS is configured properly. When I go to the Web Configuration page, select Default Web Site, create the site, associate it with the database, and click Apply, I get the error "no master data services instance section exists".
I check IIS and it thinks there is a website...
However, I check in the Master Data Services directory under SQL Server, and the web site folder is not created...
I'm running on Windows 10 Enterprise, build 19044.1586 Any idea what's going on?