Unable to answer "Is this still here?" – Makasiini Conference Centre (Arts Center) – osm.org/node/4606175593 via StreetComplete 61.0:

The conference center is still there, but the German word says it's an art center?

Unable to answer "What type of tourist information is this?" – Information – osm.org/node/10189146728 via StreetComplete 61.0:

That is the reception of a hotel.

Unable to answer "Does this crossing have an island?" – Crossing – osm.org/node/787176894 via StreetComplete 59.0:

No crosswalk here, 8 meters down the street.

Attached photo(s):
https://westnordost.de/p/242519.jpg

Unable to answer "What are the opening hours here?" – Harmonie Mutuelle (Insurance Office) – osm.org/node/7685463337 via StreetComplete 59.0:

Concierge?

Attached photo(s):
https://westnordost.de/p/242520.jpg

Unable to answer "Do these steps have a handrail?" for osm.org/way/821162397 via StreetComplete 41.2:

Die Geländer werden im Winter abgebaut und ab spätem Frühjahr wieder auf.

Unable to answer "Do these steps have a handrail?" for osm.org/way/821162396 via StreetComplete 41.2:

Die Geländer werden im Winter abgebaut und ab spätem Frühjahr wieder auf.

Unable to answer "What kind of building is this?" for osm.org/way/88702586 via StreetComplete 41.2:

Jugendherberge

Unable to answer "What’s the surface here?" for osm.org/way/449004648 via StreetComplete 54.0:

Bridge no longer there.

Attached photo(s):
https://westnordost.de/p/180273.jpg

These two street are wrong. First they are not there and the names are simply wrong. Someone did a prank.

Unable to answer "What’s the surface here?" for osm.org/way/449004645 via StreetComplete 54.0:

The bridge is no longer there.

Attached photo(s):
https://westnordost.de/p/180272.jpg