Unable to access svg files in qgroundcontrol qt release mode

I am developing qgrondcontrol version 4.2.0 on version 5.15.2 of qt. So far I have run the software in debug mode. I ran the software in release mode to create an appImage. And while I didn’t get any error in debug mode, I got the following errors in release mode.

qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/ArrowDown.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/XDelete.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/waypoint.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/FlightMap/FlightMap.qml:131:21: QML Image: Cannot open: qrc:/res/ZSLogo
qrc:/qml/QGroundControl/Controls/QGCPipOverlay.qml:237:9: QML Image: Cannot open: qrc:/res/buttonRight.svg
qrc:/qml/QGroundControl/FlightMap/FlightMap.qml:131:21: QML Image: Cannot open: qrc:/res/ZSLogo
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/XDelete.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/takeoff.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/land.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/rtl.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pause-mission.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/action.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/XDelete.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/ArrowRight.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/XDelete.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/XDelete.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/ArrowRight.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pencil.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/pencil.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/layout-right.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/layout-right.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/layout-bottom.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/layout-bottom.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/gear-black.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/ZSLogo
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/ZSLogo
setCurrentPlanViewSeqNum
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/DropArrow.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/DropArrow.svg
qrc:/qml/QGroundControl/Controls/QGCColoredImage.qml:29:5: QML Image: Cannot open: qrc:/res/TrashDelete.svg
setCurrentPlanViewSeqNum
Couldn't load GameController mapping database.
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open
QIODevice::read (QFile, ":/res/BingNoTileBytes.dat"): device not open

Despite errors, qgroundcontrol opens, but some images are not displayed due to svg files that it cannot open/reach. Why am I having this problem?