Visited on September 20.
The charger was indicating offline on eCarUp, but there was no problem indicated on location.
eCarUp app would not let start a charge. Unfortunately I didn't have an eCarUp RFID with me to check whether that would have worked. But I was able to charge with my AVIA Volt RFID. So far I have not been billed anything, unsure whether it will sync later or if it was just never registered.
I'm a bit confused by the signage. The same parking meter seems to apply to the row of white spaces, but also a row of yellow spaces on the other side. Presumably it also applies to the charging spaces.