I have reported an issue in github
It looks like keyman 10 on Windows 7 enterprise(maybe other versions) is not able to installed keyboards generated in developer 10 with bcp-47 or keyboards with multi-platform design.
I am able to install older versions of keyboards in windows 7.
Please review. I can help test and assist isolating the problem to your team.
We are investigating this issue; updates will be provided in the GitHub issue.
Thank you. I have DM’d the keyboards you needed for tested.