This is because a KMZ file is not plain text file that can be viewed in Notepad. Instead, a KMZ file is a compressed archive. You could uncompress it with unzip but there should be no need to do that.
In my conversion utilities I include a link...
First off, I got my mini 4 pro stuck in a tree within seconds of taking off from it's first flight. Cost $600 for a tree service truck to get it down for me. Almost not worth it.
So, I went through the gamut on possibilities.
My two solutions...
@penroc3
I have many ideas, but I need some facts.
How tall is the tree?
What type of tree?
What drone is it?
Can you take a picture of it and post it?
BTW,
Welcome to the forum!
Rod ..