Error when using From_Field function to parse JSON

[CasperQlik]

I am trying to parse a JSON field in Qlik using the From_Field function. But I get the following error:

The following error occurred:

Cannot open file: '***'

The error occurred here:

concept: LOAD * From_Field (topics, ItemsFromList.reference_x0020_to_x0020_begrebs)(json,utf8, no labels)

This is my script:

I followed the instructions here as far as I am aware but I cannot perform the load after I add the from_field logic.

https://community.qlik.com/t5/Design/FROM-FIELD-Is-very-powerful-It-helped-me-parse-JSON-data-stored...

Any help is appreciated.

//Casper