what is this error mean
org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: spawn ENOTDIR
Build info: version: ‘3.12.0’, revision: ‘7c6e0b3’, time: ‘2018-05-08T14:04:26.12Z’
System info: host: ‘AA179614’, ip: ‘fe80:0:0:0:8e:a41c:552c:1736%en0’, os.name: ‘Mac OS X’, os.arch: ‘x86_64’, os.version: ‘10.14.6’, java.version: ‘1.8.0_181’
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities {app: ., automationName: XCUITest, browserName: , databaseEnabled: false, deviceName: iPhone Xs Max, javascriptEnabled: true, locationContextEnabled: false, networkConnectionEnabled: false, newCommandTimeout: 180, noReset: false, platform: MAC, platformName: iOS, platformVersion: 12.4, processArguments: {args: [-settings.environment, 0], env: {XCUITest: true}}, takesScreenshot: true, udid: 0E2F6E26-0F8E-450A-8CF3-269…, webStorageEnabled: false}
Session ID: 26634dc3-d8c6-410d-96ba-c83d847ab479