['crash' means something like Windows 'your program has quit running' box.]

Do other Windows Store 'apps' run from bash? (Or from Command Prompt or Power Shell?)

For an immediate solution, install Python normally, as a command-line program, with the python.org Windows installer.

Terry@Tejarex MINGW64 ~
$ python
Python 3.7.5 (tags/v3.7.5:5c02a39a0b, Oct 15 2019, 00:11:34) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

Terry@Tejarex MINGW64 ~
$ py
Python 3.8.0 (tags/v3.8.0:fa919fd, Oct 14 2019, 19:37:50) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

Terry@Tejarex MINGW64 ~
$ py -m idlelib
[IDLE 3.8 shell runs]

You should then be able to run 'py -x.y pip install ...' to install to python x.y.

Steve, can and will you make store python runnable under bash or should this be closed?