I am trying to build a Boot to Qt Image for my Raspberry Pi 3B+. I am following this guide: https://doc.qt.io/QtForDeviceCreation/b2qt-customization-requirements.html

When I run $ bitbake b2qt-embedded-qt6-image I get the following output:

dellpc@latitude:~/b2qt_yocto/build-raspberrypi3$ bitbake b2qt-embedded-qt6-image
Loading cache: 100% |##################################################################################################################| Time: 0:00:00
Loaded 3417 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION           = "1.46.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "arm-poky-linux-gnueabi"
MACHINE              = "raspberrypi3"
DISTRO               = "b2qt"
DISTRO_VERSION       = "3.1.6"
TUNE_FEATURES        = "arm vfp cortexa7 neon vfpv4 thumb callconvention-hard"
TARGET_FPU           = "hard"
SDKMACHINE           = "x86_64"
meta                 
meta-poky            = "HEAD:a13bda44fcda4e79e9aed39ca1495eabecb6a7b7"
meta-raspberrypi     = "HEAD:77190af02d48adc2b28216775e6318e9eeda571c"
meta-oe              
meta-python          
meta-networking      
meta-initramfs       
meta-multimedia      = "HEAD:346681e7bf9c78008a845fc89031be4fd4ceb3a1"
meta-boot2qt         
meta-boot2qt-distro  = "HEAD:1441661a1aa48cfabd9e26b4cd446236c09eb26d"
meta-mingw           = "HEAD:524de686205b5d6736661d4532f5f98fee8589b7"
meta-qt6             = "HEAD:e11ec7f68dd69fe412fbef8ae108427b581e2b13"

Initialising tasks: 100% |#############################################################################################################| Time: 0:00:08
Sstate summary: Wanted 300 Found 298 Missed 2 Current 2198 (99% match, 99% complete)
NOTE: Executing Tasks
ERROR: b2qt-embedded-qt6-image-1.0-r0 do_rootfs: The postinstall intercept hook 'update_gtk_icon_cache' failed, details in /home/dellpc/b2qt_yocto/build-raspberrypi3/tmp/work/raspberrypi3-poky-linux-gnueabi/b2qt-embedded-qt6-image/1.0-r0/temp/log.do_rootfs
ERROR: Logfile of failure stored in: /home/dellpc/b2qt_yocto/build-raspberrypi3/tmp/work/raspberrypi3-poky-linux-gnueabi/b2qt-embedded-qt6-image/1.0-r0/temp/log.do_rootfs.4182
ERROR: Task (/home/dellpc/b2qt_yocto/sources/meta-boot2qt/meta-boot2qt-distro/recipes-qt/images/b2qt-embedded-qt6-image.bb:do_rootfs) failed with exit code '1'
NOTE: Tasks Summary: Attempted 7026 tasks of which 7025 didn't need to be rerun and 1 failed.

I am very new to Qt, Boot2Qt as well as Yocto. I have only a very basic understanding of it.

I would really appreciate it, If someone could help me out here by pointing me in the right direction to solve this issue.

Also, I was wondering whether the MACHINE values for Raspberry Pi 3B and 3B+ are the same. I looked it up and it seems like there are differences in hardware between the two models. Shouldn't the target image be different for both?

Thanks.