Ios 应用程序崩溃，来自调试器的消息：由于citrus pay integration中的信号6而终止

我正在为我的应用程序使用citrus pay pay gateway，我正在使用cocoapods进行集成，我正在按照下面的链接进行集成

应用程序正在崩溃，日志中显示以下错误。 dyld:未找到符号：uu swiftEmptyDictionaryStorage 引用自：/Users/skumar/Library/Developer/CoreSimulator/Devices/7EEE6ADA-B880-4BBB-9E1D-8E8608D713F2/data/Containers/Bundle/Application/415005F9-01B7-40EC-A097-59514558A75E/Lektrify CEM.app/Frameworks/CitrusPay.framework/CitrusPay/CitrusPay 预计在：/Users/skumar/Library/Developer/CoreSimulator/Devices/7EEE6ADA-B880-4BBB-9E1D-8E8608D713F2/data/Containers/Bundle/Application/415005F9-01B7-40EC-A097-59514558A75E/Lektrify CEM.app/Frameworks/libswitcore.dylib in/Users/skumar/Library/Developer/CoreSimulator/Devices/7EEE6ADA-B880-4BBB-9E1D-8E8608D713F2/data/Containers/Bundle/Application/415005F9-01B7-40EC-A097-59514558A75E/Lektrify CEM.app/Frameworks/CitrusPay.framework/CitrusPay/CitrusPay 来自调试器的消息：由于信号6而终止

能帮我解决这个问题吗。谢谢你的快速回复

and the pod file is 
# Uncomment the next line to define a global platform for your project
source 'https://github.com/CocoaPods/Specs.git'
# platform :ios, '9.0'
use_frameworks!
target 'Lektrify CEM' do

 pod 'CitrusPay', '~> 4.1.5'

  end