Unfortunately, it’s still crashing. KFFOWI Fire 7, CyanogenMod 12.1-2016021-UNOFFICIAL-ford is the OS build (says Android version 5.1.1). I just did a crash report via the device.
hmm - that build should definitely be giving you the same ‘old’ non vector icons (because android 5.1.1 is included in the range I’m checking for). Can you try rebooting your phone and confirm the problem still occurs after a reboot?
btw: someone with a pixel 3 tried to do a firmware update over USB (from the android app). Alas, we only support firmware updates over bluetooth - which is why your app just crashed. The next release will include a check to prevent enabling that button if not over bluetooth.