This error comes on runtime of a QML app, I got this error on my Yocto build and, /usr/lib/qt5/qml/QtQuick/ does not contain a directory Controls.
To fix this error
Add these to your conf file. Edit the conf file
then add this to your conf file
IMAGE_INSTALL_append = " qtdeclarative-qmlplugins qtquickcontrols-qmlplugins"
In some cases this, wont bring change check whether /usr/lib/qt5/qml/QtQuick/ contain a directory named Controls else the change is not affected. Then make these chnages to your conf file
PACKAGECONFIG_append_pn-qtbase = " accessibility" PACKAGECONFIG_append_pn-qtquickcontrols = " accessibility" IMAGE_INSTALL_append = " qtdeclarative-qmlplugins qtquickcontrols-qmlplugins"
and rebuild Yocto.
Happy Hacking 🙂