Initial fixed on post_installation.sh.
Initial fixed on post_installation.sh.

ruimalheiro/installers,learningequality/ka-lite-installers,benjaoming/installers,benjaoming/installers,mrpau/installers,mrpau/installers,learningequality/ka-lite-installers,benjaoming/installers,ruimalheiro/installers,mrpau/installers,learningequality/installers,ruimalheiro/installers,benjaoming/installers,ruimalheiro/installers,learningequality/ka-lite-installers,learningequality/installers,mrpau/installers,learningequality/ka-lite-installers,learningequality/installers,learningequality/installers