Attempt to invoke virtual method

[ozer_yesilyurt (Nivex SF)]

I’m encountering this error on my app’s splash screen. The splash screen code is only shown in the image below. I wasn’t receiving any errors before. I’m curious if the same error occurs on other pages.

[RaYzZz (Gianluca Franco)]

Hi Nivex,

I think there’s simply an error in the blocks, could you show us the Screen.Initialize?
From this error, I can tell you’re trying to run a FirebaseAuth.getCurrentUser on a null value .

[ozer_yesilyurt (Nivex SF)]

I had set up something simple and never developed it again, and this was the first time I received such an error.

[RaYzZz (Gianluca Franco)]

I don’t think the error is here, it’s related to the FirebaseAuth.getCurrentUser block.
Is it possible that you’re calling this command without being logged in?

Edit:
Confirmed

Register a user before performing a getCurrentUser.

[ozer_yesilyurt (Nivex SF)]

@RaYzZz

FirebaseAuth.getCurrentUser

It doesn’t work exactly.

[ozer_yesilyurt (Nivex SF)]

Do you have a sample login system? I only did this because I wanted my login system to remember the information after it was entered once.

[RaYzZz (Gianluca Franco)]

https://community.kodular.io/search?q=login%20template%20firebase%20order%3Alikes

[Guide] How to use Firebase Authentication on

Hello Koders! In this guide, I’m going to explain how to use the “Firebase Authentication” component in yoour apps and it’s utilities. I hope you find it useful What is Firebase Authentication? Firebase Authentication is a service that allow your users to log in and sing up into your app. Basically, you can have a login service for free with this componet/service. You don’t need any extension, because already have it. How to add it? It’s simple. Go to the …

[ozer_yesilyurt (Nivex SF)]

Yes, I saw that too, but I couldn’t think of anything I could do about it. Could you elaborate more, if it wouldn’t be a burden for you?

[ozer_yesilyurt (Nivex SF)]

Is there anyone who can help me? I need to publish my app now.

[LEANDRO_TRUCCO]

I’m having the same problem, and it’s with the “IS SIGNED IN” block. But how else can we tell if the person has logged in or not?

[LEANDRO_TRUCCO]

Hi,
Does this happen to anyone else? @Taifun @RaYzZz @pavi2410

[RaYzZz (Gianluca Franco)]

Is the error in Companion or in the APK?
Firebase authentication works only in APK.

[LEANDRO_TRUCCO]

This error appears in both versions, both in the APK and the companion version.

[LEANDRO_TRUCCO]

This appears when you open the application.

Attempt to invoke virtual method

I’m encountering this error on my app’s splash screen. The splash screen code is only shown in the image below. I wasn’t receiving any errors before. I’m curious if the same error occurs on other pages. [Ekran görüntüsü 2025-11-07 230043]

It has the same block to test if the session is started.

Attempt to invoke virtual method

I had set up something simple and never developed it again, and this was the first time I received such an error. [Ekran görüntüsü 2025-11-07 234608]

[RaYzZz (Gianluca Franco)]

Have you tried adding a timer to give Firebase time to initialize?
On Android 14 I have no issues, it works correctly even without the timer.

[LEANDRO_TRUCCO]

That’s strange, since I have it on a timer. I have Android 15, could that be the problem? It shouldn’t be. What’s the minimum SDK?

[RaYzZz (Gianluca Franco)]

@LEANDRO_TRUCCO

What’s the minimum SDK?

21

Firebase Authentication - Kodular Docs

@LEANDRO_TRUCCO

since I have it on a timer

And how much time passes before IsSignedIn is called?

[LEANDRO_TRUCCO]

5 seconds, i have a splash screen. And i consult if the user is signed or not.

[RaYzZz (Gianluca Franco)]

But is it a splash screen inside a screen1 or in a virtual screen?
I think you need to wait one second in the screen where the Firebase component is present.

[LEANDRO_TRUCCO]

in screen 1, i have a clock and firebase in screen 1.