ProBas harvester does not correctly read technology information

E.g. the dataset https://md.umwelt.info/dataset/probas-uba/5871f46f-f185-49f6-9bed-1588e66db5b4 has an empty "description" field - but the corresponding json file /home/ubuntu/metadaten/data/responses/probas-uba/process-json-5871f46f-f185-49f6-9bed-1588e66db5b4.isol does contain a field:

    "technology" : {
      "technologyDescriptionAndIncludedProcesses" : [ {
        "value" : "renewbility Datenbasis\nBesetzungsgrad: 1Personen\nFahrleistung: 9390km/a\nKraftstoff/Antrieb: Benzin\nLebensdauer: 20a\nspezifischer Verbrauch: 0,976MJ/km\nspezifischer Verbrauch: 3,1l/100 km\nStraßenkategorie: Durchschnittswert",
        "lang" : "de"
      } ]
    }

As I read the code this should be parsed into the description:

    let description = process
        .tech_info
        .map(|tech_info| tech_info.description.german("description", &id))
        .transpose()?;

but the field remains empty.