Safari + Crome throw confusing error when check-in or check-out page are refreshed

[Wifi-cable]

The same error happens when the phone goes to sleep while using the ctt web app.

The error is "raum nicht gefunden" (room not found)

This error message confuses users. A reloaded page should ideally not cause errors. If error is unavoidable because of session tolkens, the Error message could be more helpful. Example "Bitte neu einchecken" (please re check in) or "Oh, ihre Session ist abgelaufen. wollen sie sich neu ein checken? " ( oh, your session expired. Do you want to check in again? )