Please further explain how to make the code work

[LeonDragon]

I have clone the code to my Visual Studio. When I rebuild and run it, it give error "System.ArgumentNullException: 'Value cannot be null. (Parameter 'input')'" on Regex.Match.cs

I guess I miss some steps, for example how to run the Camuda API server (Java code)

Thus, could you please give more information about the Camunda API server, and how to Run it to test the C# code for the front-end.

Thank you very much.