error handling in some plugin APIs broken for non-network errors

[vdagguma]

UBports Installer 0.8.7-beta (snap)
Environment: Ubuntu Core 20 linux 5.8.0-44-generic x64 NodeJS v12.18.3
Device: jasmine_sprout
Target OS: Ubuntu Touch
Settings: undefined
OPEN-CUTS run: https://ubports.open-cuts.org/run/60484e2a52bd840007f91e8a
Log: N/A

After installing stock android 9 and rebooted into recovery mode, it is trying "Adb is scanning for devices" and finally got this error

[vdagguma]

This is for mi A2 device

[NeoTheThird]

error: Error: systemimage:install: TypeError: Cannot read property 'status' of undefined
stack trace: TypeError: Cannot read property 'status' of undefined
    at /snap/ubports-installer/348/app/resources/app.asar/src/core/plugins/systemimage/api.js:81:26
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

Looks like we messed up the error handling a little there. That's a bug.