I am trying to run the test but nothing happens after app installation. App flash screen appear 2-3 times and test cases are stuck.
Here are the logs
➜ ~ appium --relaxed-security
[Appium] Welcome to Appium v1.8.0 (REV 7ad6d98cedde01809e32d56ab8ced064f6f28175)
[Appium] Non-default server args:
[Appium] relaxedSecurityEnabled: true
[Appium] Appium REST http interface listener started on 0.0.0.0:4723
[HTTP] --> POST /wd/hub/session
[HTTP] {"capabilities":{"firstMatch":[{}],"alwaysMatch":{"platformName":"iOS"}},"desiredCapabilities":{"app":"/Users/Test/Desktop/app/Test.app","platformName":"iOS","platformVersion":"11.3","deviceName":"iPhone 7","automationName":"XCUITest","showXcodeLog":true,"shutdownOtherSimulators":true}}
[debug] [MJSONWP] Calling AppiumDriver.createSession() with args: [{"app":"/Users/Test/Desktop/app/Test.app","platformName":"iOS","platformVersion":"11.3","deviceName":"iPhone 7","automationName":"XCUITest","showXcodeLog":true,"shutdownOtherSimulators":true},null,{"firstMatch":[{}],"alwaysMatch":{"platformName":"iOS"}}]
[debug] [BaseDriver] Event 'newSessionRequested' logged at 1524739766994 (15:49:26 GMT+0500 (PKT))
[Appium] Could not parse W3C capabilities: 'deviceName' can't be blank. Falling back to JSONWP protocol.
[Appium] The following capabilities were provided in the JSONWP desired capabilities that are missing in W3C capabilities: ["app","platformName","platformVersion","deviceName","automationName","showXcodeLog","shutdownOtherSimulators"]. Falling back to JSONWP protocol.
[Appium] Creating new XCUITestDriver (v2.76.2) session
[Appium] Capabilities:
[Appium] app: /Users/Test/Desktop/app/Test.app
[Appium] platformName: iOS
[Appium] platformVersion: 11.3
[Appium] deviceName: iPhone 7
[Appium] automationName: XCUITest
[Appium] showXcodeLog: true
[Appium] shutdownOtherSimulators: true
[Appium] Applying relaxed security to XCUITestDriver as per server command line argument
[debug] [BaseDriver] Creating session with MJSONWP desired capabilities: {"app":"/Users/Test...
[BaseDriver] Session created with session id: 9c3bb508-c7ee-42e5-b38e-adba376a83f3
[debug] [XCUITest] Current user: 'Test'
[debug] [XCUITest] Xcode version set to '9.3' (tools v9.3.0.0.1.1521514116)
[debug] [XCUITest] iOS SDK Version set to '11.3'
[debug] [BaseDriver] Event 'xcodeDetailsRetrieved' logged at 1524739767274 (15:49:27 GMT+0500 (PKT))
[iOSSim] Constructing iOS simulator for Xcode version 9.3 with udid 'FA26ABC7-E5EE-4B81-9015-DD01E558E536'
[XCUITest] Determining device to run tests on: udid: 'FA26ABC7-E5EE-4B81-9015-DD01E558E536', real device: false
[BaseDriver] Using local app '/Users/Test/Desktop/app/Test.app'
[debug] [BaseDriver] Event 'appConfigured' logged at 1524739767533 (15:49:27 GMT+0500 (PKT))
[debug] [XCUITest] Checking whether app '/Users/Test/Desktop/app/Test.app' is actually present on file system
[debug] [XCUITest] App is present
[debug] [iOS] Getting bundle ID from app '/Users/Test/Desktop/app/Test.app': 'org.provider.Test'
[debug] [BaseDriver] Event 'resetStarted' logged at 1524739767546 (15:49:27 GMT+0500 (PKT))
[XCUITest] Not scrubbing third party app in anticipation of uninstall
[debug] [BaseDriver] Event 'resetComplete' logged at 1524739767753 (15:49:27 GMT+0500 (PKT))
[debug] [XCUITest] Starting log capture for iOS Simulator with udid 'FA26ABC7-E5EE-4B81-9015-DD01E558E536', using 'xcrun simctl spawn FA26ABC7-E5EE-4B81-9015-DD01E558E536 log stream --style compact'
[debug] [BaseDriver] Event 'logCaptureStarted' logged at 1524739768106 (15:49:28 GMT+0500 (PKT))
[XCUITest] Setting up simulator
[XCUITest] Detected 1 other running Simulator.Shutting it down...
[debug] [XCUITest] Killing running processes 'xcodebuild.*B5F7824B-83B6-4260-832D-B0D35DDC5FF8, B5F7824B-83B6-4260-832D-B0D35DDC5FF8.*XCTRunner' for the device B5F7824B-83B6-4260-832D-B0D35DDC5FF8...
[debug] [XCUITest] 'pgrep -nif xcodebuild.*B5F7824B-83B6-4260-832D-B0D35DDC5FF8' didn't detect any matching processes. Return code: 1
[debug] [XCUITest] 'pgrep -nif B5F7824B-83B6-4260-832D-B0D35DDC5FF8.*XCTRunner' didn't detect any matching processes. Return code: 1
[debug] [iOS] No reason to set locale
[debug] [iOS] No iOS / app preferences to set
[debug] [iOSSim] Matched 1 Simulator cache item for cleanup: /Users/Test/Library/Developer/CoreSimulator/Devices/FA26ABC7-E5EE-4B81-9015-DD01E558E536/data/Library/Caches/com.apple.mobile.installd.staging
[debug] [iOSSim] Setting common Simulator preferences to {"ConnectHardwareKeyboard":false}
[debug] [iOSSim] Updated FA26ABC7-E5EE-4B81-9015-DD01E558E536 Simulator preferences at '/Users/Test/Library/Preferences/com.apple.iphonesimulator.plist' with {"ConnectHardwareKeyboard":false}
[debug] [iOSSim] The count of running Simulator UI client instances is 1
[iOSSim] Both Simulator with UDID FA26ABC7-E5EE-4B81-9015-DD01E558E536 and the UI client are currently running
[debug] [BaseDriver] Event 'simStarted' logged at 1524739779949 (15:49:39 GMT+0500 (PKT))
[debug] [XCUITest] Reset requested. Removing app with id 'org.provider.Test' from the device
[debug] [XCUITest] Installing '/Users/Test/Desktop/app/Test.app' on Simulator with UUID 'FA26ABC7-E5EE-4B81-9015-DD01E558E536'...
[debug] [XCUITest] The app has been installed successfully.
[debug] [BaseDriver] Event 'appInstalled' logged at 1524739788881 (15:49:48 GMT+0500 (PKT))
[XCUITest] Using WDA path: '/Users/Test/.nvm/versions/node/v9.3.0/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent'
[XCUITest] Using WDA agent: '/Users/Test/.nvm/versions/node/v9.3.0/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent/WebDriverAgent.xcodeproj'
[debug] [XCUITest] No obsolete cached processes from previous WDA sessions listening on port 8100 have been found
[debug] [JSONWP Proxy] Proxying [GET /status] to [GET http://localhost:8100/status] with no body
[debug] [JSONWP Proxy] Got response with status 200: "{\n \"value\" : {\n \"state\" : \"success\",\n \"os\" : {\n \"name\" : \"iOS\",\n \"version\" : \"11.3\",\n \"sdkVersion\" : \"11.3\"\n },\n \"ios\" : {\n \"simulatorVersion\" : \"11.3\",\n \"ip\" : \"192.168.1.159\"\n },\n \"build\" : {\n \"time\" : \"Apr 25 2018 23:27:26\"\n }\n },\n \"sessionId\" : \"FEBC4148-54EB-4F7D-85E0-8ACDE1CBF617\",\n \"status\" : 0\n}"
[XCUITest] Will reuse previously cached WDA instance at 'http://localhost:8100/'. Set the wdaLocalPort capability to a value different from 8100 if this is an undesired behavior.
[debug] [BaseDriver] Event 'wdaStartAttempted' logged at 1524739789002 (15:49:49 GMT+0500 (PKT))
[XCUITest] Using provided WebdriverAgent at 'http://localhost:8100/'
[debug] [BaseDriver] Event 'wdaSessionAttempted' logged at 1524739789003 (15:49:49 GMT+0500 (PKT))
[debug] [XCUITest] Sending createSession command to WDA
[debug] [JSONWP Proxy] Proxying [GET /status] to [GET http://localhost:8100/status] with no body
[debug] [JSONWP Proxy] Got response with status 200: "{\n \"value\" : {\n \"state\" : \"success\",\n \"os\" : {\n \"name\" : \"iOS\",\n \"version\" : \"11.3\",\n \"sdkVersion\" : \"11.3\"\n },\n \"ios\" : {\n \"simulatorVersion\" : \"11.3\",\n \"ip\" : \"192.168.1.159\"\n },\n \"build\" : {\n \"time\" : \"Apr 25 2018 23:27:26\"\n }\n },\n \"sessionId\" : \"FEBC4148-54EB-4F7D-85E0-8ACDE1CBF617\",\n \"status\" : 0\n}"
[debug] [JSONWP Proxy] Proxying [POST /session] to [POST http://localhost:8100/session] with body: {"desiredCapabilities":{"bundleId":"org.provider.Test","arguments":[],"environment":{},"shouldWaitForQuiescence":true,"shouldUseTestManagerForVisibilityDetection":false,"maxTypingFrequency":60,"shouldUseSingletonTestManager":true}}
It was working fine earlier but all of a sudden it stopped working 
