Appimage ImportError libpangoft2-1.0.so.0 undefined symbol at start

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Description of the Problem, or Question?

Can’t start Mypaint 2 alpha:
ImportError: /tmp/tmp.4kHXYCJeEH/libpangoft2-1.0.so.0: undefined symbol: FcWeightFromOpenTypeDouble
[Detaching after fork from child process 31287]
[Inferior 1 (process 31185) exited normally]
(gdb)

Basic System Details

MyPaint—20190127.AppImage

Ubuntu 14.04

For our guidelines to create a great user support ticket, please visit this wiki page at https://github.com/mypaint/mypaint/wiki/Reporting-Bugs#reporting-guidelines

Ubuntu 14.04 is end of life in just a couple months, have you considered updating?
https://www.ubuntu.com/about/release-cycle

Do you have fontconfig-ubuntu installed?