deCONZ upgrade from 2.11.5 to 2.12.6 crashes

Same here, I posted a question on discord. detail as below: -

I have an issue after updating to 2.12.6 this morning. I have a ConBee II on a Raspberry Pi 4 running Buster, Kernel 5.10.52-v8+ . Before updating deConz/Phoscon, I updated the ConBee II F/W to the latest 0x26720700 successfully. It is headless by the way, so don’t really use deConz-GUI. I have tried reinstalling the deb package manually after the initial issues to no avail. When I start deConz initially, I get: -

systemctl status deconz
● deconz.service - deCONZ: ZigBee gateway – REST API
Loaded: loaded (/lib/systemd/system/deconz.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2021-08-20 12:35:57 BST; 2s ago
Main PID: 5008 (deCONZ)
Tasks: 3 (limit: 3949)
CGroup: /system.slice/deconz.service
└─5008 /usr/bin/deCONZ -platform minimal --http-port=80 Aug 20 12:35:57
raspberrypi4 systemd[1]: Started deCONZ: ZigBee gateway – REST API. Aug 20 12:35:58
raspberrypi4 deCONZ[5008]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to ‘/tmp/runtime-pi’ Aug 20 12:35:58
raspberrypi4 deCONZ[5008]: libpng warning: iCCP: known incorrect sRGB profile Aug 20 12:35:58
raspberrypi4 deCONZ[5008]: This plugin does not support propagateSizeHints() Aug 20 12:35:58
raspberrypi4 deCONZ[5008]: This plugin does not support propagateSizeHints()(edited)

Then after a few seconds I get: -
systemctl status deconz
● deconz.service - deCONZ: ZigBee gateway – REST API
Loaded: loaded (/lib/systemd/system/deconz.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: signal) since Fri 2021-08-20 12:36:35 BST; 14s ago
Process: 5030 ExecStart=/usr/bin/deCONZ -platform minimal --http-port=80 (code=killed, signal=BUS) Main PID: 5030 (code=killed, signal=BUS)

Same issues as @rsedlmeier in journalctl logs: -

systemd[1]: Started deCONZ: ZigBee gateway – REST API.
Aug 20 12:56:29 raspberrypi4 deCONZ[6458]: QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to ‘/tmp/runtime-pi’
Aug 20 12:56:29 raspberrypi4 deCONZ[6458]: libpng warning: iCCP: known incorrect sRGB profile
Aug 20 12:56:30 raspberrypi4 deCONZ[6458]: This plugin does not support propagateSizeHints()
Aug 20 12:56:30 raspberrypi4 deCONZ[6458]: This plugin does not support propagateSizeHints()
Aug 20 12:56:33 raspberrypi4 deCONZ[6458]: This plugin does not support propagateSizeHints()
Aug 20 12:56:33 raspberrypi4 systemd[1]: deconz.service: Main process exited, code=killed, status=7/BUS
Aug 20 12:56:33 raspberrypi4 systemd[1]: deconz.service: Failed with result ‘signal’.
Aug 20 12:56:33 raspberrypi4 systemd[1]: deconz-init.service: Start request repeated too quickly.
Aug 20 12:56:33 raspberrypi4 systemd[1]: deconz-init.service: Failed with result ‘start-limit-hit’.
Aug 20 12:56:33 raspberrypi4 systemd[1]: Failed to start deCONZ: ZigBee gateway – Initialisation.

Any help appreciated
It worked fine under version 2.11.5, the last stable