Similar error, also suddenly. Was actually playing, people started timing out from my host. Went and restarted, went to log in, and this was the error:
Client Version: 2023.3.0
java.lang.IllegalArgumentException: No redirect uris provided
at com.faforever.client.login.OAuthValuesReceiver.receiveValues(OAuthValuesReceiver.java:55)
at com.faforever.client.login.LoginController.onLoginButtonClicked(LoginController.java:272)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Note: Same error in both the previous client and the current. After not being able to log in, I tried updating my client and same error message.