GmsCore is crashing when trying to add a Google Account

• /e/ version: 1.5-beta-r
• Device model(s): FP4
• Device rooted: no

Summary

Adding a Google Account though microG settings is crashing.

The problem

10-13 08:31:49.672  7815  7815 D AndroidRuntime: Shutting down VM
10-13 08:31:49.673  7815  7815 E AndroidRuntime: FATAL EXCEPTION: main
10-13 08:31:49.673  7815  7815 E AndroidRuntime: Process: com.google.android.gms:ui, PID: 7815
10-13 08:31:49.673  7815  7815 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.android.gms/org.microg.gms.auth.login.LoginActivity}: java.lang.IllegalArgumentException: AppCompat does not support the current theme features: { windowActionBar: false, windowActionBarOverlay: false, android:windowIsFloating: false, windowActionModeOverlay: false, windowNoTitle: false }