The template has a launch form, but the launch-process request does not specify the required launch parameters. 

API Developers

When a template has a Launch Form, every launch-process request must specify the following in the request body, where fieldi are the fields in the Launch Form:

  "launch_params": {
    "field1_name": <field1_value>,
    "field2_name": <field2_value>,
    "field3_name": <field3_value>,
    "field4_name": <field4_value>,

This error occurs when launch_params is null or empty.

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