Please add the next lines to the nl_NL.json.
"energy_delivered": "Totaal geleverd",
"energy_deliveredtoday": "Vandaag geleverd",
"gas_usage": "Gasverbruik",

Updated again & changed the variables. Works fine now. Thanks

As requested my CONFIG.js. Worked fine before the update

Updated to the last release from 4 hours ago. Now I only get a black screen. No blocks or other info is shown. Also tried the standard CONFIG, no luck there either.