While inspecting my archives of historical data I notice the station was renamed from "Hotel Kronen" to "Hotel Krone" on 2020-11-26. I assume this was a typo in the original name.
On Swisscharge the picture shows the charger in an underground parking. Only 1 of the 2 parking spots in front is painted green. There's an EV+energie360 sign on the wall in front of that parking space. The picture also shows a gate, so I suspect you need to contact the reception to open it.
The website for the hotel doesn't seem to mention charging stations or parking anywhere in text, but there's a PDF linked at the bottom "Gästeinformation" https://api2.lunchgate.ch/digital-menu/dm/lang/de/menu/6509b7a9501d9bdfc6e6cb32a633f4fc that has information:
Charging station
We offer a charging station for electric cars. The charging station must be operated with the designated app
Parking
Our parking spaces in the underground garage are free of charge for our guests during their stay at the hotel. Use of the underground car parking is at your risk. No liability is accepted.
The information is translated in German, English and French, but the information isn't in the same order in the translations as the titles are sorted alphabetically for each language.