AppImage : std::logic_error ?

[nyue]

Using the continuous version.

Building on Ubuntu 16.04 Xenial

~/Downloads/linuxdeployqt-continuous-x86_64.AppImage /home/nyue/temp/AppDir/usr/share/applications/qgr.desktop -appimage -qmake=/home/nyue/Qt5.14.2/5.14.2/gcc_64/bin/qmake

When trying to launch the freshly built AppImage I get this

$ ./Amazing_Qt_App-x86_64.AppImage 
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_M_construct null not valid
Aborted (core dumped)