Question about Roborock S6

Perhaps someone has already had a similar problem with the Roborock S6? It worked perfectly for a week. But since yesterday morning it can no longer connect to the Wi-Fi. I have already tried everything. Reinstalled the app, reset the WLAN, restarted the Swisscom router.... Still not working. When I go to the view of the Roborock where the map of the flat is normally displayed, the map is loaded non-stop and all the buttons and the three dots at the top right cannot be used.