Mapboxgl cannot be imported on Windows 10 after conda install

I installed mapboxgl from conda-forge, but when I try to import it (or anything from it), I get the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\manow\miniconda3\envs\py37_test\lib\site-packages\mapboxgl\__init__.py", line 1, in <module>
    from .viz import CircleViz, GraduatedCircleViz, HeatmapViz, ClusteredCircleViz, ImageViz, RasterTilesViz, ChoroplethViz, LinestringViz
  File "C:\Users\manow\miniconda3\envs\py37_test\lib\site-packages\mapboxgl\viz.py", line 12, in <module>
    from mapboxgl import templates
  File "C:\Users\manow\miniconda3\envs\py37_test\lib\site-packages\mapboxgl\templates.py", line 4, in <module>
    loader=PackageLoader('mapboxgl', 'templates'),
  File "C:\Users\manow\miniconda3\envs\py37_test\lib\site-packages\jinja2\loaders.py", line 324, in __init__
    f"The {package_name!r} package was not installed in a"
ValueError: The 'mapboxgl' package was not installed in a way that PackageLoader understands.

Start with mapboxgl/init.py, mapboxgl/viz.py, and mapboxgl/templates.py, then inspect how the conda-forge package includes the templates directory. Reproduce the import failure on Windows 10 with the reported conda installation and verify that importing mapboxgl succeeds without the PackageLoader error.