Import of MXL (compressed XML) ends with error message missing "zlib module"

[Sam]

Hello Lilypondians,
I tried to import compressed musicxml files (MXL), but no matter which 
Lilypond version I am using (not all of them, of course, but 2.19.31/65 
+ 82), I always get the error message "De-compression requires the 
(missing) zlib module". The attachment contains a MXL file for testing 
purposes. According to Lilypond and also Frescobaldi's import dialog an 
MXL import should be possible. As it looks something is missing with the 
bundled Python.

Greetings
Andreas

OS is Windows 10 (1809), Lilypond 2.19.31/65/82 (in 3 different 
directories) and Frescobaldi 2.20.0 are installed.

P.S.: since the import via XML works quite well for me (but not in 
2.9.65/82), the MXL problem never bothered me much. Unfortunately 
MuseScore has changed the extension from .xml to .musicxml, so you have 
to rename files you want to import all the time. Maybe you could add the 
extension musicxml for the import.

Nh_Reichard_Abends_male.mxl
Description: Binary data