I'm new to using this plugin and new to the Play Store. I got this error below, which some searching of the plugin's source code and some googling confirmed that it has nothing to do with the plugin. I haven't gotten past this error yet, but my understanding is that the app needs to go through a google review before uploading through the API will succeed. Assuming that's the case, I'm just requesting that you include some helpful text to that effect for future users when they encounter this error.

 
Uploading file to internal app sharing on Google Play...

• Credential: 07f42d06-3a26-4747-9b58-6f1ea75d0996
• Application ID: ******

AAB file: app/build/outputs/bundle/stage/app-stage.aab
File size: 29.50 MB
SHA-1 hash: b2a38c0e52916cff48a6d61df83127a51df1f25d
versionCode: 5
versionName: 1.0
minSdkVersion: 30

Upload failed:

• UploadException: NOT_PUBLISHED [[]] (******)

No changes have been applied to the Google Play account