Comment 5 for bug 1656433

I had the same problem with OpenSCAD and Kubuntu 16.04 LTS. The upgrade to Qt 5.6.1 deleted libqt5scintilla2-12v5 (2.9.1) since it broke Qt5.6 - and removed OpenSCAD with it.

I solved the problem with newer versions of libqt5scintilla2-12v5 and libqt5scintilla2-l10n (2.9.3). Since they haven't come upon us the official way, we have to download them directly [1]. After download install both packages with

sudo dpkg --install libqt5scintilla2-12v5_2.9.3+dfsg-3_amd64.deb libqt5scintilla2-l10n_2.9.3+dfsg-3_all.deb

With libqt5scintilla2 present OpenSCAD works fine - and chances are good that Eric will too.

GHPS

[1]: https://www.ubuntuupdates.org/package/core/yakkety/universe/base/libqt5scintilla2-12v5
https://www.ubuntuupdates.org/package/core/yakkety/universe/base/libqt5scintilla2-l10n