I am attempting to use https://pwabuilder.com to generate an Android App Bundle for my website and upload it to the Google Play Store.
I have been following the instructions listed here exactly: https://github.com/pwa-builder/CloudAPK/blob/master/Next-steps.md
I believe step 3 may be inaccurate or out of date because the Google Play prompt includes this:
Step 3 in the tutorial is telling me to "Opt out" and then upload the aab bundle, but Google says by opting out you will not be able to upload an aab file.
And sure enough, when I select "Opt out" and attempt to upload my app's aab file, I receive the following error:
To upload an Android App Bundle you must be enrolled in App Signing by Google Play.
How can I correct this? Should I upload an apk instead? Should I select a different option? Something else?
Here are the other options:

