Appium crashes giving the error "Error getting source, can't continue finding element by XPath"

My appium version is 1.4.13. Xcode version is 7, iOS simulator version is 8.4.

Appium server crashes while trying to execute a command.
The same test used to work perfectly fine. Not sure why it is not working now.
appium_crash_log.txt (11.8 KB)
I have also added the following command in my capabilities.
capabilities.setCapability(“newCommandTimeout” , 60);

Appium log attached here.

I am having the same issue…