"Has closed indefinitely, there is not even a sign anymore."
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-08-14T02:00:17Z
POI name: Kvibergs Museum
POI types: tourism-museum
#organicmaps android

"permanently closed - see website"
OSM snapshot date: 2023-06-02T17:16:21Z
POI name: Kvibergs Museum
POI types: tourism-museum
#organicmaps