Variable extractor Custom decoder?

Dear Support,

I'm referring to a similar question and that is the Custom decoder. The answer you gave is using the javascript decodeURIComponent() function but when I do use it and click apply I do not get the expected decoding but the same string.

I tried to add to the extracted value at the end .toString.

Fact is that when I'm using a JavaScript outside the Variable Extractor with the same function decodeURIComponent() the conversion works.

The extraction value is vqT1LgBwL5udbWWqafjgBA\u00253D\u00253DTAG0 and the expected should be vqT1LgBwL5udbWWqafjgBA==TAG0.

I still use Neoload 7.3.

Any idea?

Thx