Oneplus 3: dtb not found

==> initramfs: creating /boot/initramfs-postmarketos-qcom-msm8996
Scanning kernel module dependencies...
NOTE: ** modprobe warnings below can be ignored ** if your device does not run the
mainline kernel yet (most devices!) or if the related kernel options are enabled
with 'y' instead of 'm' (module).
 - deviceinfo: panel_samsung_s6e3fa3 msm
 - 00-default.modules: dm_crypt ext4 usb_f_rndis
==> kernel: device-tree blob operations
==> kernel: appending device-tree qcom/msm8996-oneplus3
==> initramfs: creating boot.img
==> initramfs: creating /boot/initramfs-postmarketos-qcom-msm8996-extra
(088195) [20:44:03] Check kconfig: /home/erny/.local/var/pmbootstrap/cache_git/pmaports/main/linux-postmarketos-qcom-msm8996/config-postmarketos-qcom-msm8996.aarch64
(088195) [20:44:03] (native) boot postmarketos-qcom-msm8996 kernel
(088195) [20:44:03] (native) calculate depends of android-tools, avbtool (pmbootstrap -v for details)
(088195) [20:44:03] (native) % fastboot --cmdline  boot /mnt/rootfs_oneplus-oneplus3/boot/boot.img-postmarketos-qcom-msm8996
Sending 'boot.img' (27016 KB)                      OKAY [  1.245s]
Booting                                            FAILED (remote: 'dtb not found')
fastboot: error: Command failed
(088195) [20:44:07] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^