I installed Jami from pamac, and it would not display it showed it was running but was unable to show app.
Then ran from terminal which threw following error. qrc:/qt-project.org/imports/Qt5Compat/GraphicalEffects/DropShadow.qml:6:1: Cannot load library /usr/lib/qt6/qml/Qt5Compat/GraphicalEffects/private/libqtgraphicaleffectsprivateplugin.so: (libQt6ShaderTools.so.6: cannot open shared object file: No such file or directory)
And it worked.
There was an option in the install to choose graphical effects, however it needed qt6-shadertools