BIG PROBLEM ! WITH API30 in Google Console

I wanted to upload my app into Google PLay Console but it didn't work because it is using à API 30 instead of API 31. What can we do know ?

Thank you for your support

Jimy

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IT WORKS !!!! THANK YOU ANKE !!! YOUR THE BEST !!! Here is the link to the test server app : http://ai2-test.appinventor.mit.edu.ezproxy.canberra.edu.au/