R8!?I tried to publish the app thunkable pro and google console tells me I'm missing R8! What this means!?

I tried to publish the app thunkable pro and google console tells me I’m missing R8!
What this means!?

Are you seeing that every time or has it only happened once?

Every time! Thank you!

Are you able to download the app to your personal device for testing? Does everything work when you do that?