New to appybuilder monetization errors that i cant understand


Hi! I was finishing my app and going to send it to the playstore.

I followed all the tutorials about Admob; tried with the test ids and worked OK.

But when i got mines ID’s i get
“internal error”
" Something happened internally, for instance, an invaollid responde was received from the ad server"

I dont understand what im doing wrong. I didnt published yet the game, must i publish to the play store for my ads to work?

ALso i noted that in screen section, under the app name it says ApplicationPackage i leaved it blank; i had to put any number or something provided by admob?