org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Path must be a string. Received undefined (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 1.50 seconds
Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46'
System info: host: 'AReed-MacBook-Pro.local', ip: '192.168.50.213', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.12', java.version: '1.8.0_91'
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities [{app=/Users/andrewreed/Documents/nm-appium-acceptance-tests/Nutmeg Dev.app, networkConnectionEnabled=false, noReset=false, databaseEnabled=false, deviceName=iPhone 6, fullReset=true, platform=MAC, newCommandTimeout=600, platformVersion=10.0, webStorageEnabled=false, locationContextEnabled=false, automationName=XCUITest, browserName=, takesScreenshot=true, javascriptEnabled=true, platformName=iOS}]
Session ID: 097b4100-4615-4bcf-98b1-bc036273ee1d

	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
	at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
	at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:43)
	at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:216)
	at io.appium.java_client.AppiumDriver.launchApp(AppiumDriver.java:257)
	at com.hf.nutmeg.appium.utils.AppUtils.relaunchApp(AppUtils.java:115)
	at com.hf.nutmeg.appium.stepdefs.LoginStepDefs.theAppWillRememberMyEmailAddress(LoginStepDefs.java:137)
	at ✽.Then the app will remember my email address(Login.feature:51)