How do I log in to Minecraft PE, the screen is only white for me?

I bought minecraft for my mobile phone some time ago, but whenever I tap on "Sign in with Microsoft account", there's only a white screen with minecraft on top, but nothing more happens. Do I have to change anything, in the settings of the mobile phone or in the browser? I hope you can help me in any way, thanks in advance!

Did you buy Minecraft PE with your Microsoft account?
If so, did you restart your cell phone and try again?

No via the Google play store… Unfortunately, otherwise I could also play it on the ipad. But I can register on my mother's samsung tablet

Then it can't work with a Microsoft account, since the purchase is registered on a Google account.

But I also downloaded it on my mother's tablet from Google play, since you can use a purchased app on multiple devices, and that worked when I signed in

Yes it was bought via Google Play, then you have to log in with the same Google Play account, then it also works on other devices.

I think you just have to wait or uninstall again and

I have tried this very often, it never worked and there's no waiting, I left the page open while I was eating and nothing happened

I had bought it on my mobile phone and I can't log in with my Microsoft account to play on servers, everything goes offline

Again: If you bought it via a Google account (as you say), then you also have to log on to the respective device with the Google account. A Microsoft account is not a Google account!

I have the game on all devices on which I want it. I don't need a Google account to log in to minecraft as far as I know in order to be able to play on servers. I can open minecraft on hany yes, it is also downloaded, but when I click on Sign in with a Microsoft account, it only shows this white screen and my question was now whether anyone knows whether I have to change something or something.

Why do you have to sign in with a Microsoft account?

Then I don't know what to do next? 😢

So that I can play online on servers