“Could not connect to lockdownd” while attempting to run flutter app

Question

I am following the Get Started tutorial.

I can install everything, flutter doctor returns all checkmarks but in the end there is a message:

Answer 1

Disconnect all iOS devices, then:

brew uninstall ideviceinstaller
brew uninstall libimobiledevice
brew install --HEAD libimobiledevice
brew link --overwrite libimobiledevice
brew install --HEAD  ideviceinstaller
brew link --overwrite ideviceinstaller
sudo rm -rf /var/db/lockdown/*

Connect an iOS device, and choose "Trust" when prompted, after that:

sudo chmod -R 777 /var/db/lockdown/