Skoop! Inc.: Error Message of "JSON could not be serialized because of error" appears with all apps

iOS 13.6
The Annan Shed app for iOS
Menchie's app for iOS
Q Jump app for iOS
Project Pizza UK app for iOS
Farm Stores Mobile app for iOS
Best Budz Club app for iOS
5FiVE app for iOS
Welcome to Liverpool app for iOS
Wooster's Bakery app for iOS
POLN8 app for iOS

The majority of apps released by a company called Skoop! Inc. all display the following error message at launch.

This error message says:

"JSON could not be serialized because of error: The data couldn't be ready because it isn't in the correct format."



The following apps:

Best Club Terminal app for iOS
POLN8 Terminal app for iOS
Skoop! Terminal 2 app for iOS

Do not display this error message when they are launched.

Steps to Reproduce:

1. Download an launch any of the Skoop! apps specified above
2. Note the error message

Result: The majority of apps from a developer called Skoop! Inc. display an error message

Expected: An error message about JSON should not be displayed when an app is launched