I'm getting an error when I open the 2017 BA desktop shortcut. I have the 2017 data and am running 10.4.1.
This is the error:

The map eventually opens but none of the base layers/demo data etc are loaded in the table of contents.
The 2016 map works fine but it has the 2016 data and boundaries.
Any ideas? Will it only open for 10.5?