kml file does not open properly

[fonio]

Describe the bug
I have both GPX and KML files for the same activity from Garmin connect (attached)

To Reproduce
Steps to reproduce the behavior:
Executing python geo_heatmap.py activity_5972548926.klm opens the browser in coordinates 0:0

Executing python geo_heatmap.py activity_5972548926.gpx opens the browser with heatmap in the center

Software version - commit 7c12365
Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec 7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32
Chrome version 87.0.4280.66 (Official Build) (64-bit)
Win 10

10X

[luka1199]

Does the klm file produce a heatmap or is the map empty?