Error encountered while processing command (domain=IXErrorDomain, code=2): Failed to create IXPlaceholder for app bundle ID io.ionic.starter

Hi there,
I’m getting the below error when running ionic cordova run ios


** BUILD SUCCEEDED **

No target specified for emulator. Deploying to iPhone-X, 11.2 simulator

An error was encountered processing the command (domain=IXErrorDomain, code=2):
Failed to create IXPlaceholder for app bundle ID io.ionic.starter
An error was encountered processing the command (domain=FBSOpenApplicationServiceErrorDomain, code=5):
The request to open "io.ionic.starter" failed.
(null) was unable to service the request.
io.ionic.starter: -1
logPath: /Users/josh/Apps/Illume/illume/platforms/ios/cordova/console.log

Note: the log doesn’t seem to be there despite the last line of the error.

My ionic info output:

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.1
    ionic (Ionic CLI) : 3.19.1

global packages:

    cordova (Cordova CLI) : 8.0.0

local packages:

    @ionic/app-scripts : 3.0.0
    Cordova Platforms  : ios 4.5.4
    Ionic Framework    : ionic-angular 3.7.1

System:

    ios-deploy : 1.9.2
    Node       : v6.11.2
    npm        : 5.6.0
    OS         : macOS High Sierra
    Xcode      : Xcode 9.2 Build version 9C40b

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro

Reinstalling Xcode fixed this issue.