Cupra app with Wi-Fi not available

Servus together, Since the Cupra app or version 2.5.0 has been moved, it no longer works with us when the smartphone is online via WLAN, but ONLY via mobile data. When you try to log in the WLAN via Cupra ID, the app only “twitches” after PW input and jumps back to the login mask. Also, the app does not open. When dialing in via mobile data everything works again perfectly. Someone knows the problem and knows a solution, so that it also functions in the WLAN. rt? Thanks and VG Chris