Unable to launch app in 1.6.4-beta

I upgraded to Appium v1.6.4-beta and initially the app was launching fine on my iOS real device. Now, I do not know why it is not launching at all. I am facing this problem ever since I downloaded the Appium-Desktop (which I uninstalled it later and re-installed Appium 1.5.3 GUI).

Now, I am not even able to run my tests on 1.6.0 as I get the same error. I am completely blocked.
Appreciate any help on this regard please.

Eclipse Log:
I am getting SessionNotCreatedException: Unable to create new remote session.

Appium Log:
[Appium] Welcome to Appium v1.6.4-beta (REV f27da993b90856c7d8dceea3953e03c16be1431f)
[Appium] Non-default server args:
[Appium] sessionOverride: true
[Appium] Appium REST http interface listener started on 0.0.0.0:4723
[HTTP] --> POST /wd/hub/session {“desiredCapabilities”:{“app”:"/Users/Shared/IPA/Apps/MyCompany.ipa",“noReset”:false,“bundleId”:“com.company.dept.dev”,“autoDismissAlerts”:true,“xcodeConfigFile”:"/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent/Config.xcconfig",“locationServicesEnabled”:true,“deviceName”:“iPhone7,1”,“locationServicesAuthorized”:true,“newCommandTimeout”:“7200”,“realDeviceLogger”:"/usr/local/lib/node_modules/deviceconsole/deviceconsole",“platformVersion”:“10.2”,“automationName”:“XCUITest”,“waitForAppScript”:"$.delay(8000); $.acceptAlert();",“platformName”:“iOS”,“udid”:“964333b6d7e39b2379812dfca9c4cbbf1d598a44”,“autoAcceptAlerts”:true},“requiredCapabilities”:{},“capabilities”:{“desiredCapabilities”:{“app”:"/Users/Shared/IPA/Apps/MyCompany.ipa",“noReset”:false,“bundleId”:“com.company.dept.dev”,“autoDismissAlerts”:true,“xcodeConfigFile”:"/usr/local/lib/node_modules/appium/node_modules/appium-xcuitest-driver/WebDriverAgent/Config.xcconfig","locationServic
[debug] [MJSONWP] Bad parameters: BadParametersError: Parameters were incorrect. We wanted {“required”:[“desiredCapabilities”],“optional”:[“requiredCapabilities”,“capabilities”,“sessionId”,“id”]} and you sent [“desiredCapabilities”,“requiredCapabilities”,“capabilities”,“alwaysMatch”,“firstMatch”]
[HTTP] <-- POST /wd/hub/session 400 145 ms - 243

This issue is being seen due to https://github.com/appium/java-client/issues/594