Can't be installed on Debian

[probono]

> ./Subsurface-4.5.6-x86_64.AppImage: symbol lookup error: /usr/lib64/libX11.so.6: undefined symbol: xcb_wait_for_reply64

There is a blacklist on
https://github.com/probonopd/AppImages/blob/master/excludelist with
files that should not be bundled inside AppImages. Please make sure
that none of them are bundled inside the AppImage.

Does the AppImage on
https://bintray.com/probono/AppImages/Subsurface/4.5.1.1445#files have
the same issue?

Let me know if the problem persists, then I will get an openSUSE
installation to reproduce this.