Attempting to build your app with Fritz SDK versions <= 5.2.0 on Xcode 11.4 will cause a number of errors to appear. The first one is usually:
Swift Compiler Error: "Session" is not a member of type "Fritz Core"
To solve this issue, make sure you are using Fritz SDK version 5.3.0 or higher on iOS. In your Podfile, specify
pod 'Fritz', '~> 5.3.0'
Make sure you run
pod repo update and
pod install to upgrade.