If you are having issues, kindly raise a support ticket on link below:
https://websitetoapk.com/support/submit_ticket

As per the latest Google Play policy for API Level 29, we have released a compatible update.

Changelog:
API Level 29.
**Bug Fixes

Update v4.1 is now available with API Level 29.

https://websitetoapk.com/download.html

For any issues, report us by creating a new thread, we will fix them asap.

You can raise a ticket again if having issues with v4.0 created apps and we will look into it.

@kimberley They will keep working fine. However, you might update them if you wish to upgrade API Level of your apps.

Yes, we will be releasing an update with API Level 29 support before that deadline, update is already under testing process.

Apps created using v4.0 won't show up any false positive alert.

This icon pattern is due to latest material design guidelines, as you can also see on many other apps. The icon fits between the circle to make it look similar to all others. But one thing that you can do to get some large icon is that you should make your edges rounded and transparent as the outer circle holds inner image with small margin. You simply need to know that if you use rounded icon it will show the biggest possible, you can try out with that.

It seems like your network specific issue, kindly consider checking on some other network.

No need of Android Studio. Simply use google-services.json file in App builder, that's all. Follow the steps and nothing more.
https://websitetoapk.com/docs/fcm-push-integration.html