i am still getting this error with ios 17.2 and xcode 15.2
Failed to create session. An unknown server-side error occurred while processing the command. Original error: Unable to launch WebDriverAgent because of xcodebuild failure: xcodebuild failed with code 70. This usually indicates an issue with the local Xcode setup or WebDriverAgent project configuration or the driver-to-platform version mismatch. Consider setting ‘showXcodeLog’ capability to true in order to check the Appium server log for build-related error messages… Make sure you follow the tutorial at https://github.com/appium/appium-xcuitest-driver/blob/master/docs/real-device-config.md. Try to remove the WebDriverAgentRunner application from the device if it is installed and reboot the device.