Final answer:
The error is caused by missing a required parameter for the getformcontext method in the form editor user interface.
Step-by-step explanation:
The cause of the error in this scenario is option 3) The code is missing a required parameter for the getformcontext method.
The getformcontext method is used to retrieve the form context object in the form editor user interface. It requires a parameter to specify the execution context, such as the form type or form identifier. Without this parameter, the method cannot retrieve the formcontext object, resulting in an error.
Make sure that the code provides the required parameter for the getformcontext method. For example:
var formContext = executionContext.getFormContext();