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Here is the reply we provided by email:
We have heard about this from a couple other users. 1.17.0 seems to not accept the KMZ files we are creating. The whole KMZ import into the DJI app thing is a complete hack. It is not a published feature by DJI. We basically figured out how to do it. They are free to change things on their end at any time which with then render what we are doing useless. We will attempt to figure out what is going on and fix the issue and hopefully have something out by the end of the week.