[bug]: Manage Process Variables plug-in - Null number values

[LouisMoreaux]

Flows for APEX version

23.1 (latest)

Oracle Database version

19c

Oracle APEX version

20.2

Have you used the BPMN-Linter in Flow Designer to Validate your Diagram?

Yes

What happened?

When using the JSON option with substitution syntax for a page item of type number, then you got this error message

Steps to reproduce

Use the plug-in to set a number process variable type with a page item using a JSON syntax like this

[
        {
		"name": "my_num_var",
		"type": "number",
		"value": &PX_MY_ITEM.
	}
]

Let the item empty and submit the page

Using double quote around the substitution string leads to another error message

[
        {
		"name": "my_num_var",
		"type": "number",
		"value": "&PX_MY_ITEM."
	}
]

Expected behaviour

No error message and number consider as null