Thanks @JonB, now I see fewer warnings
root@arm:/media/sd-mmcblk0p1# ./browser
QStandardPaths: wrong permissions on runtime directory /media/sd-mmcblk0p1/qt_runtime, 0755 instead of 0700
qt.qpa.input: libinput: event0 - TSC2007 Touchscreen: is tagged by udev as: Touchscreen
qt.qpa.input: libinput: event0 - TSC2007 Touchscreen: device is a touch device
qt.qpa.input: libinput: event1 - gpio-keys: is tagged by udev as: Keyboard
qt.qpa.input: libinput: event1 - gpio-keys: device is a keyboard
qt.qpa.input: Using xkbcommon for key mapping
qt.qpa.input: libinput: registerDevice /dev/input/event0 - TSC2007 Touchscreen
This plugin does not support createPlatformOpenGLContext!
qt.qpa.input: evdevtouch: Adding device at /dev/input/event0
qt.qpa.input: evdevtouch: Using device /dev/input/event0
qt.qpa.input: evdevtouch: /dev/input/event0: Protocol type B (mtdev) (multi), filtered=no
qt.qpa.input: evdevtouch: /dev/input/event0: min X: 0 max X: 0
qt.qpa.input: evdevtouch: /dev/input/event0: min Y: 0 max Y: 0
qt.qpa.input: evdevtouch: /dev/input/event0: min pressure: 0 max pressure: 4095
qt.qpa.input: evdevtouch: /dev/input/event0: device name: TSC2007 Touchscreen
QQmlApplicationEngine failed to load component
file:///media/sd-mmcblk0p1/main.qml:3:1: module "QtQuick.Window" is not installed
file:///media/sd-mmcblk0p1/main.qml:2:1: module "QtWebEngine" is not installed
file:///media/sd-mmcblk0p1/main.qml:3:1: module "QtQuick.Window" is not installed
file:///media/sd-mmcblk0p1/main.qml:2:1: module "QtWebEngine" is not installed
Illegal instruction
but the main problem is still here