Unable to add class/classes with addClassesToSVGElement

[919Studios]

Have tried several variations of addClassesToSVGElement (https://github.com/BohemianCoding/svgo-compressor#addclassestosvgelement) but have not been able to successfully add a class/classes with it.

Here is the actual code for reference:

{
    "name": "addClassesToSVGElement",
    "params": {
        "className": "test",
        "classNames": [
            "test",
            "another-test"
        ]
    }
}

Thank you in advance!

[buditanrim-bl]

I can't get the addClassesToSVGElement working.
The other plugin works fine.

Sketch 55.1
SVGO Compressor 1.7.0