solution with video tutorial working for me
How to change Target API level 30 to 31 in MIT App Inventor 2
Follow the steps-:
- Open the Main site of the MIT App Inventor http://ai2.appinventor.mit.edu/
- Open Your App.
- Now Click on the Project and export the aia file of the selected project.
- Now Open the Test version of the App Inventor link -: http://ai2-test.appinventor.mit.edu/
- Now Click on project and import the aia file that you have recently exported.
- Now go again the main site http://ai2.appinventor.mit.edu/
- Click on the project and select Export Keystore
- Now Import the keystore in your test version of the app inventor http://ai2-test.appinventor.mit.edu/
- Now Build the aab file and upload this file to playstore