Solved

After app update, it doesn't work anymore

Cosa hai provato a fare?
Update app version 622 (iPhone)

Cosa è successo invece?
I updated the app on iPhone and I can't log in anymore

Il problema si è verificato durante l'utilizzo di dati Wi-Fi, mobili o entrambi?
Both

Il problema si è verificato nell'App, sul PC o in entrambi?
App

Qual è il modello del tuo dispositivo?
Iphone

Qual è il sistema operativo?
iOS

Qual è il numero di versione del sistema operativo?
26.3.1

Può essere riprodotto il bug?
I was notified by a manager who recently updated the app to version 622 of iGP Manager that it no longer works on iPhone. He told me this: "I updated the app on iPhone and I can't log in anymore." Luckily, I haven't updated it yet. Can you fix this?

Commenti addizionali:

I updated the app thinking it would fix some bugs (monochrome cars in 2D races). I can confirm that there are issues with the login page. If you press "Sign in with Apple," the page doesn't load (to log in, you have to close the app and reopen it). In some cases, the same problem occurs even when you log in by pressing "Login" and entering your username and password. Sometimes it loads, sometimes it doesn't, and to log in, you have to close the app and reopen it again.

No, it's not an Internet problem because the same problem occurs with both WiFi and mobile data.

I tried uninstalling and reinstalling the app as you suggested. It still has the same problem. Nothing has changed. Once you log into the app (by closing the app and reopening it), the game behaves normally. The problem is trying to “sign in with Apple”

P.S. Sandy Carr explained in detail in the forum how iPhones behave when you press the "Sign in with Apple" button.

ok I tried 3 times. Now it works.