With evelauncher-1543721.tar.gz I see the following message. This is on Fedora 30 and I haven;t fiddled with anything, so likely really on Wayland not X, I run the launcher and see this:
[balister@mini evelauncher]$ ./evelauncher.sh
QObject::startTimer: Timers can only be used with threads started with QThread
qt.qpa.plugin: Could not load the Qt platform plugin “wayland” in “” even though it was found.
Could not initialize GLX
./evelauncher.sh: line 14: 4720 Aborted (core dumped) “$dirname/appname" "@”
I do have this working on other boxes.