Error: Segmentation fault (core dumped)

[giswqs]

Operating system: Manjaro Linux KDE Edition 18.0.
Python version: 3.6.6
Label-maker version: 0.4.0
Error: Segmentation fault (core dumped). See screenshot.

[user@linux label-maker-data]$ label-maker download
Saving QA tiles to data/togo.mbtiles
Segmentation fault (core dumped)

I have tried label-maker on different computers with Manjaro Linux 18.0. All of them have the same error message above. I did try label-maker on a virtual machine with Ubuntu, and it works fine. So I guess the error is specific to Manjaro Linux. I did Google, but failed to find any solution.

I am wondering if there is any other Manjaro user having this issue? Any help would be appreciated.