The installed app opened with the black screen

[TAN_HOCK_WENG_STUDEN]

Hi, when I use my phone to connect to the MIT AI2 companion, the error comes out:

but the MIT AI2 companion is working well, here is the page:

Then this app is opened on my phone and shows me a black screen when I install this app packed from the MIT app inventor.

Here is my block:

Here are my Firebase data and rules:

I already checked the firebase API key and the firebase URL is correct.
How can I solve this problem?
Any help with this would be greatly appreciated. Thank again!

[TIMAI2]

The AI2 firebase component only works with the us-central server for firebase projects.

Either:

1. Create new project on the us-central server
   or
2. Use the web component (or available extensions) to interact with your firebase data

[TAN_HOCK_WENG_STUDEN]

thank you very much! I create new project on the us-central server.